590 lines
18 KiB
C
590 lines
18 KiB
C
#include "header.h"
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/*
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before init : 11111000
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after init : 11111000
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after start : 1000
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after SLA+W : 11000
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1 : 11000
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2 : 11000
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3 : 11000
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4 : 11000
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5 : 11000
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6 : 11000
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7 : 11000
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8 : 11000
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9 : 11000
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10 : 11000
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20 : 11000
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30 : 11000
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40 : 11000
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50 : 11000
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60 : 11000
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70 : 11000
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80 : 11000
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90 : 11000
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100 : 11000
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110 : 11000
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120 : 11000
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130 : 11000
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140 : 11000
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150 : 11000
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160 : 11000
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170 : 11000
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180 : 11000
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190 : 11000
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200 : 11000
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1200 : 11000
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after stop : 11111000
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*/
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/*
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before init : 11111000
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after init : 11111000
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before start : 11111000
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after start : 1000
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waiting 200ms... : 1000
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done waiting : 1000
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send SLA+W : 1000
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after SLA+W : 11000
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waiting 10ms... : 11000
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done waiting : 11000
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send 0xAC (trigger measurement) : 11000
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after 0xAC : 101000
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send parameter 1st byte 0x33 : 101000
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after 0x33 : 101000
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send parameter 2nd byte 0x00 : 101000
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after 0x00 : 101000
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status ? 0 : 101000
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status ? 10 : 101000
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status ? 20 : 101000
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status ? 30 : 101000
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status ? 40 : 101000
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status ? 50 : 101000
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status ? 60 : 101000
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status ? 70 : 101000
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status ? 80 : 101000
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status ? 90 : 101000
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status ? 100 : 101000
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status ? 110 : 101000
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status ? 120 : 101000
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status ? 130 : 101000
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after stop : 11111000
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*/
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/*
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before init : 11111000 no state information available
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after init : 11111000
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before start : 11111000
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after start : 1000 start condition transmitted
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waiting 200ms... : 1000
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done waiting : 1000
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send SLA+W : 1000
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after SLA+W : 11000 SLA+W transmitted, ACK received
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waiting 10ms... : 11000
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done waiting : 11000
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send 0xAC (trigger measurement) : 11000
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after 0xAC : 101000 data transmitted, ACK received
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send parameter 1st byte 0x33 : 101000
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after 0x33 : 101000
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send parameter 2nd byte 0x00 : 101000
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after 0x00 : 101000
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send repeat start : 101000
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after repeat start : 10000 repeated start condition transmitted
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send SLA+R : 10000
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after SLA+R : 1000000 SLA+R transmitted, ACK received
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status ? 0 : 1000000
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status ? 10 : 1000000
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status ? 20 : 1000000
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status ? 30 : 1000000
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status ? 40 : 1000000
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status ? 50 : 1000000
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status ? 60 : 1000000
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status ? 70 : 1000000
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status ? 80 : 1000000
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status ? 90 : 1000000
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status ? 100 : 1000000
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status ? 110 : 1000000
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status ? 120 : 1000000
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status ? 130 : 1000000
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after stop : 11111000
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*/
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/*
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before init : 11111000 no state information available
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after init : 11111000
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before start : 11111000
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after start : 1000 start condition transmitted
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send 0x71 to get a byte of status word : 1000
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after 0x71 : 1000000 SLA+R transmitted, ACK received
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waiting 200ms... : 1000000
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done waiting : 1000000
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send 0x71 to get a byte of status word : 1000000
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after 0x71 : 1011000 data received, NACK returned
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send SLA+W : 1011000
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after SLA+W : 1011000
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waiting 10ms... : 1011000
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done waiting : 1011000
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send 0xAC (trigger measurement) : 1011000
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after 0xAC : 11111000 no state information available
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send parameter 1st byte 0x33 : 11111000
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after 0x33 : 11111000
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send parameter 2nd byte 0x00 : 11111000
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after 0x00 : 11111000
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send repeat start : 11111000
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after repeat start : 1000 start condition transmitted
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send SLA+R : 1000
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after SLA+R : 1000000 SLA+R transmitted, ACK received
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status ? 0 : 1000000
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status ? 10 : 1000000
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status ? 20 : 1000000
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status ? 30 : 1000000
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status ? 40 : 1000000
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status ? 50 : 1000000
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status ? 60 : 1000000
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status ? 70 : 1000000
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status ? 80 : 1000000
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status ? 90 : 1000000
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status ? 100 : 1000000
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status ? 110 : 1000000
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status ? 120 : 1000000
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status ? 130 : 1000000
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after stop : 11111000
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*/
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/*
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init i2c : 11111000 no state information available
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after init : 11111000
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start transmission : 11111000
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after start : 1000 start condition transmitted
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send SLA+W : 1000
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after SLA+W : 11000 SLA+W transmitted, ACK received
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waiting 10ms... : 11000
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done waiting : 11000
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send 0xAC (trigger measurement) : 11000
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after 0xAC : 101000 data transmitted, ACK received
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send parameter 1st byte 0x33 : 101000
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after 0x33 : 101000
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send parameter 2nd byte 0x00 : 101000
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after 0x00 : 101000
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send repeat start : 101000
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after repeat start : 10000 repeated start condition transmitted
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send SLA+R : 10000
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after SLA+R : 1000000 SLA+R transmitted, ACK received
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status ? 0 : 1000000
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status ? 10 : 1000000
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status ? 20 : 1000000
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status ? 30 : 1000000
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status ? 40 : 1000000
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status ? 50 : 1000000
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status ? 60 : 1000000
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status ? 70 : 1000000
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status ? 80 : 1000000
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status ? 90 : 1000000
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status ? 100 : 1000000
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status ? 110 : 1000000
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status ? 120 : 1000000
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status ? 130 : 1000000
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send stop : 1000000
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after stop : 11111000 no state information available
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*/
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/*
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init i2c : 11111000 no state information available
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after init : 11111000
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start transmission : 11111000
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after start : 1000 start condition transmitted
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send SLA+W : 1000
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after SLA+W : 11000 SLA+W transmitted, ACK received
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send 0xAC (trigger measurement) : 11000
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after 0xAC : 101000 data transmitted, ACK received
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send parameter 1st byte 0x33 : 101000
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after 0x33 : 101000
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send parameter 2nd byte 0x00 : 101000
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after 0x00 : 101000
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send repeat start : 101000
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after repeat start : 10000 repeated start condition transmitted
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send SLA+R : 10000
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after SLA+R : 1000000 SLA+R transmitted, ACK received
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status ? 0 : 1000000
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status ? 10 : 1000000
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status ? 20 : 1000000
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status ? 30 : 1000000
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status ? 40 : 1000000
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status ? 50 : 1000000
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status ? 60 : 1000000
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status ? 70 : 1000000
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status ? 80 : 1000000
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status ? 90 : 1000000
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status ? 100 : 1000000
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status ? 110 : 1000000
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status ? 120 : 1000000
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status ? 130 : 1000000
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send stop : 1000000
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after stop : 11111000 no state information available
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*/
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/*
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init i2c : 11111000 no state information available
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after init : 11111000
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start transmission : 11111000
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after start : 1000 start condition transmitted
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send SLA+W : 1000
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after SLA+W : 11000 SLA+W transmitted, ACK received
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send 0xAC (trigger measurement) : 11000
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after 0xAC : 101000 data transmitted, ACK received
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send parameter 1st byte 0x33 : 101000
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after 0x33 : 101000
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send parameter 2nd byte 0x00 : 101000
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after 0x00 : 101000
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send SLA+R : 101000
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after SLA+R : 110000 data transmitted, NACK received
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status ? 0 : 110000
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status ? 10 : 110000
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status ? 20 : 110000
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status ? 30 : 110000
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status ? 40 : 110000
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status ? 50 : 110000
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status ? 60 : 110000
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status ? 70 : 110000
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status ? 80 : 110000
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status ? 90 : 110000
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status ? 100 : 110000
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status ? 110 : 110000
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status ? 120 : 110000
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status ? 130 : 110000
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send stop : 110000
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after stop : 11111000
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*/
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/*
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init i2c : 11111000 no state information available
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after init : 11111000
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start transmission : 11111000
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after start : 1000 start condition transmitted
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send SLA+W : 1000
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after SLA+W : 11000 SLA+W transmitted, ACK received
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send 0xAC (trigger measurement) : 11000
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after 0xAC : 101000
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send parameter 1st byte 0x33 : 101000
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after 0x33 : 101000
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send parameter 2nd byte 0x00 : 101000
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after 0x00 : 101000
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send repeat start : 101000
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after repeat start : 10000
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send SLA+R : 10000
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after SLA+R : 1000000
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read 1 data : 1000000
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after read : 1011000
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````````````````````````read 2 data : 1011000
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after read : 1011000
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read 3 data : 1011000
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after read : 1011000
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```````````````````````````````````````` : read 4 data : 1011000
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after read : 1011000
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`read 5 data : 1011000
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after read : 1011000
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read 6 data : 1011000
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after read : 1011000
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read 7 data : 1011000
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after read : 1011000
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```````````````````````````` : read 8 data : 1011000
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after read : 1011000
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` : read 9 data : 1011000
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after read : 1011000
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` :
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send stop : 1011000
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after stop : 11111000
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*/
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/*
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init i2c : 11111000 TW_NO_INFO -> No state information available
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after init : 11111000 TW_NO_INFO -> No state information available
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start transmission : 11111000 TW_NO_INFO -> No state information available
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after start : 1000 TW_START -> Start condition transmitted
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send SLA+W : 1000 TW_START -> Start condition transmitted
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after SLA+W : 11000 TW_MT_SLA_ACK -> SLA+W transmitted, ACK received
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send 0xAC (trigger measurement) : 11000 TW_MT_SLA_ACK -> SLA+W transmitted, ACK received
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after 0xAC : 101000 TW_MT_DATA_ACK -> Data transmitted, ACK received
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send parameter 1st byte 0x33 : 101000 TW_MT_DATA_ACK -> Data transmitted, ACK received
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after 0x33 : 101000 TW_MT_DATA_ACK -> Data transmitted, ACK received
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send parameter 2nd byte 0x00 : 101000 TW_MT_DATA_ACK -> Data transmitted, ACK received
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after 0x00 : 101000 TW_MT_DATA_ACK -> Data transmitted, ACK received
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send repeat start : 101000 TW_MT_DATA_ACK -> Data transmitted, ACK received
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after repeat start : 10000 TW_REP_START -> Repeated start condition transmitted
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send SLA+R : 10000 TW_REP_START -> Repeated start condition transmitted
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after SLA+R : 1000000 TW_MR_SLA_ACK -> SLA+R transmitted, ACK received
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read 1 data : 1000000 TW_MR_SLA_ACK -> SLA+R transmitted, ACK received
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after read : 1011000 TW_MR_DATA_NACK -> Data received, NACK returned
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152
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read 2 data : 1011000 TW_MR_DATA_NACK -> Data received, NACK returned
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after read : 1011000 TW_MR_DATA_NACK -> Data received, NACK returned
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196
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read 3 data : 1011000 TW_MR_DATA_NACK -> Data received, NACK returned
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after read : 1011000 TW_MR_DATA_NACK -> Data received, NACK returned
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182
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read 4 data : 1011000 TW_MR_DATA_NACK -> Data received, NACK returned
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after read : 1011000 TW_MR_DATA_NACK -> Data received, NACK returned
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213
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read 5 data : 1011000 TW_MR_DATA_NACK -> Data received, NACK returned
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after read : 1011000 TW_MR_DATA_NACK -> Data received, NACK returned
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255
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read 6 data : 1011000 TW_MR_DATA_NACK -> Data received, NACK returned
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after read : 1011000 TW_MR_DATA_NACK -> Data received, NACK returned
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212
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read 7 data : 1011000 TW_MR_DATA_NACK -> Data received, NACK returned
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after read : 1011000 TW_MR_DATA_NACK -> Data received, NACK returned
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164
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read 8 data : 1011000 TW_MR_DATA_NACK -> Data received, NACK returned
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after read : 1011000 TW_MR_DATA_NACK -> Data received, NACK returned
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255
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read 9 data : 1011000 TW_MR_DATA_NACK -> Data received, NACK returned
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after read : 1011000 TW_MR_DATA_NACK -> Data received, NACK returned
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255
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send stop : 1011000 TW_MR_DATA_NACK -> Data received, NACK returned
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after stop : 11111000 TW_NO_INFO -> No state information available
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*/
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// status codes :
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// -- Master --
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// TW_BUS_ERROR 0x00 = 0b0 = 0 -> illegal start or stop condition
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// TW_START 0x08 = 0b1000 = 8 -> start condition transmitted
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// TW_REP_START 0x10 = 0b10000 = 16 -> repeated start condition transmitted
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// -- Master Transmitter --
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// TW_MT_SLA_ACK 0x18 = 0b11000 = 24 -> SLA+W transmitted, ACK received
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// TW_MT_SLA_NACK 0x20 = 0b100000 = 32 -> SLA+W transmitted, NACK received
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// TW_MT_DATA_ACK 0x28 = 0b101000 = 40 -> data transmitted, ACK received
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// TW_MT_DATA_NACK 0x30 = 0b110000 = 48 -> data transmitted, NACK received
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// TW_MT_ARB_LOST 0x38 = 0b111000 = 56 -> arbitration lost in SLA+W or data
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// -- Master Receiver --
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// TW_MR_ARB_LOST 0x38 = 0b111000 = 56 -> arbitration lost in SLA+R or NACK
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// TW_MR_SLA_ACK 0x40 = 0b1000000 = 64 -> SLA+R transmitted, ACK received
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// TW_MR_SLA_NACK 0x48 = 0b1001000 = 72 -> SLA+R transmitted, NACK received
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// TW_MR_DATA_ACK 0x50 = 0b1010000 = 80 -> data received, ACK returned
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// TW_MR_DATA_NACK 0x58 = 0b1011000 = 88 -> data received, NACK returned
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// TW_SR_GCALL_DATA_NACK 0x98 = 0b10011000 = 152 -> general call data received, NACK returned
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// TW_ST_SLA_ACK 0xA8 = 0b10101000 = 168 -> SLA+R received, ACK returned
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// TW_NO_INFO 0xF8 = 0b11111000 = 248 -> no state information available
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#define AHT20_ADDRESS 0x38 // doc AHT20, 7.3 : address of thermistor : 0b111000, 56
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// volatile uint8_t i2c_data = 0;
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void print_hex_value(char c) {
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char buffer[3] = {0};
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int_to_hex_string(c, buffer, 2);
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uart_printstr(buffer);
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}
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void print_status_meaning(uint16_t status) {
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switch (status) {
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case 0x00: uart_printstr("TW_BUS_ERROR -> Illegal start or stop condition"); break;
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case 0x08: uart_printstr("TW_START -> Start condition transmitted"); break;
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case 0x10: uart_printstr("TW_REP_START -> Repeated start condition transmitted"); break;
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case 0x18: uart_printstr("TW_MT_SLA_ACK -> SLA+W transmitted, ACK received"); break;
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case 0x20: uart_printstr("TW_MT_SLA_NACK -> SLA+W transmitted, NACK received"); break;
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case 0x28: uart_printstr("TW_MT_DATA_ACK -> Data transmitted, ACK received"); break;
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case 0x30: uart_printstr("TW_MT_DATA_NACK -> Data transmitted, NACK received"); break;
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case 0x38: uart_printstr("TW_MT_ARB_LOST/TW_MR_ARB_LOST -> Arbitration lost in SLA+W/R or Nack"); break;
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case 0x40: uart_printstr("TW_MR_SLA_ACK -> SLA+R transmitted, ACK received"); break;
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case 0x48: uart_printstr("TW_MR_SLA_NACK -> SLA+R transmitted, NACK received"); break;
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case 0x50: uart_printstr("TW_MR_DATA_ACK -> Data received, ACK returned"); break;
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case 0x58: uart_printstr("TW_MR_DATA_NACK -> Data received, NACK returned"); break;
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case 0x98: uart_printstr("TW_SR_GCALL_DATA_NACK -> General call data received, NACK returned"); break;
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case 0xA8: uart_printstr("TW_ST_SLA_ACK -> SLA+R received, ACK returned"); break;
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case 0xF8: uart_printstr("TW_NO_INFO -> No state information available"); break;
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default: uart_printstr("Unknown status code");
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}
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}
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void _print_status(char *str) {
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uint8_t status;
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status = TWSR & 0b11111000; // Table 22-2. Status codes for Master Transmitter Mode
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uint16_t size = 53;
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size -= uart_printstr(str);
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size -= uart_printstr(" : ");
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size -= uart_printstr_itoa_base(status, 2);
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// print status meaning
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while (size--) {
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uart_tx(' ');
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}
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print_status_meaning(status);
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uart_printstr_endl("");
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}
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void print_status_anyway(char *str) {
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_print_status(str);
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}
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void print_status(char *str) {
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_print_status(str);
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return;
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}
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void print_data() {
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uint8_t data;
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for (uint8_t i = 0; i < 10; i++) {
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data = i2c_read_nack();
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print_hex_value(data);
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if (i == 0) {
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uart_tx('(');
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uart_printstr_itoa_base(data, 2);
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uart_tx(')');
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}
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if (i < 9) {
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uart_tx(' ');
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}
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}
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uart_printstr_endl("");
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}
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Boolean aht20_is_status_ready(void) {
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uint8_t status;
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i2c_start();
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i2c_send_addr_w(AHT20_ADDRESS);
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// i2c_write(0xAC);
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// i2c_write(0x33);
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// i2c_write(0x00);
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i2c_start_repeat();
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i2c_send_addr_r(AHT20_ADDRESS);
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status = i2c_read_nack();
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i2c_stop();
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uart_printstr("- status : ");
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uart_printstr_itoa_base_endl(status, 2);
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if (status & 0b10000000) {
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return TRUE;
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} else {
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return FALSE;
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}
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}
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void aht20_wait_for_status() {
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for (uint8_t i = 0; i < 30; i++) {
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uart_tx('|');
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if (aht20_is_status_ready()) {
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break;
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}
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_delay_ms(10);
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}
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}
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// description
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int main() {
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uart_init();
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// 0x18 : 11000 : 24
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// 0x33 : 110011 : 51 -> DATA0
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// 0x38 : 111000 : 56
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// 0x70 : 1110000 : 112 -> SLA+W
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// 0x71 : 1110001 : 113 -> SLA+R
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// 0x80 : 10000000 : 128
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//
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// doc AHT20 7.4 : trigger measurement data and read temperature and humidity
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// 0. init i2c
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// 1. after power on, wait >= 100ms
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// 2. send SLA+W 0x70
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// 3. wait 10ms
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// 4. send 0xAC command (172, 0b10101100) (trigger measurement), this command parameter has 2 bytes :
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// 5. send DATA0 : 0x33
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// 6. send DATA1 : 0x00
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// 7. delay >= 80ms (wait for status[7] == 0)
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// 8. send SLA+R
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// 9. read 6 bytes
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// 10. read CRC
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print_status("init i2c");
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i2c_init();
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print_status(" after init");
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print_status("\r\nstart transmission");
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i2c_start();
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print_status(" after start");
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// aht20_wait_for_status();
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print_status("\r\nwaiting 200ms...");
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_delay_ms(200);
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print_status(" done waiting");
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|
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print_status("\r\nsend SLA+W");
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i2c_send_addr_w(AHT20_ADDRESS);
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print_status(" after SLA+W");
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|
|
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print_status("\r\nwaiting 20ms...");
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_delay_ms(20);
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|
print_status(" done waiting");
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|
|
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print_status("\r\nsend 0xAC (trigger measurement)");
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|
i2c_write(0xAC);
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print_status(" after 0xAC");
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|
print_status("send parameter 1st byte 0x33");
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i2c_write(0x33);
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|
print_status(" after 0x33");
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|
print_status("send parameter 2nd byte 0x00");
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|
i2c_write(0x00);
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|
print_status(" after 0x00");
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|
|
|
for (uint8_t i = 0; i < 10; i++) {
|
|
// print_status("\r\nwaiting 100ms...");
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|
// _delay_ms(100);
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|
// print_status(" done waiting");
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|
|
|
// aht20_wait_for_status();
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|
|
|
print_status("\r\nsend repeat start");
|
|
i2c_start_repeat();
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|
print_status(" after repeat start");
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|
|
|
print_status("\r\nsend SLA+R");
|
|
i2c_send_addr_r(AHT20_ADDRESS);
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|
print_status_anyway(" after SLA+R");
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|
|
|
print_status("\r\nbefore read data");
|
|
print_data();
|
|
print_status(" after read data");
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|
|
|
_delay_ms(300);
|
|
}
|
|
|
|
print_status("\r\nsend stop");
|
|
i2c_stop();
|
|
print_status(" after stop");
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|
|
|
while(1);
|
|
}
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