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i broke everything whaaat

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This commit is contained in:
hugo LAMY
2025-03-16 21:08:33 +01:00
parent 6fa2df3b44
commit 54d9bea111
5 changed files with 182 additions and 96 deletions
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130
module06/ex01/main.c
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@@ -400,7 +400,9 @@ send stop : 1011000 TW_MR_DATA_NACK -> Data recei
// TW_ST_SLA_ACK 0xA8 = 0b10101000 = 168 -> SLA+R received, ACK returned
// TW_NO_INFO 0xF8 = 0b11111000 = 248 -> no state information available
#define SLAVE_ADDRESS 0x38 // doc AHT20, 7.3 : address of thermistor : 0b111000, 56
#define AHT20_ADDRESS 0x38 // doc AHT20, 7.3 : address of thermistor : 0b111000, 56
// volatile uint8_t i2c_data = 0;
void print_hex_value(char c) {
char buffer[3] = {0};
@@ -429,8 +431,7 @@ void print_status_meaning(uint16_t status) {
}
}
void print_status(char *str) {
return;
void _print_status(char *str) {
uint8_t status;
status = TWSR & 0b11111000; // Table 22-2. Status codes for Master Transmitter Mode
uint16_t size = 53;
@@ -445,16 +446,73 @@ void print_status(char *str) {
print_status_meaning(status);
uart_printstr_endl("");
}
void print_status_anyway(char *str) {
_print_status(str);
}
void print_status(char *str) {
_print_status(str);
return;
}
void print_data() {
uint8_t data;
for (uint8_t i = 0; i < 10; i++) {
data = i2c_read_nack();
print_hex_value(data);
if (i == 0) {
uart_tx('(');
uart_printstr_itoa_base(data, 2);
uart_tx(')');
}
if (i < 9) {
uart_tx(' ');
}
}
uart_printstr_endl("");
}
Boolean aht20_is_status_ready(void) {
uint8_t status;
i2c_start();
i2c_send_addr_w(AHT20_ADDRESS);
// i2c_write(0xAC);
// i2c_write(0x33);
// i2c_write(0x00);
i2c_start_repeat();
i2c_send_addr_r(AHT20_ADDRESS);
status = i2c_read_nack();
i2c_stop();
uart_printstr("- status : ");
uart_printstr_itoa_base_endl(status, 2);
if (status & 0b10000000) {
return TRUE;
} else {
return FALSE;
}
}
void aht20_wait_for_status() {
for (uint8_t i = 0; i < 30; i++) {
uart_tx('|');
if (aht20_is_status_ready()) {
break;
}
_delay_ms(10);
}
}
// description
int main() {
uart_init();
// 0x18 : 11000 : 24
// 0x33 : 110011 : 51 -> DATA0
// 0x38 : 111000 : 56
// 0x70 : 1110000 : 112 -> SLA+W
// 0x71 : 1110001 : 113 -> SLA+R
// 0x18 : 11000 : 24
// 0x33 : 110011 : 51 -> DATA0
// 0x38 : 111000 : 56
// 0x70 : 1110000 : 112 -> SLA+W
// 0x71 : 1110001 : 113 -> SLA+R
// 0x80 : 10000000 : 128
//
// doc AHT20 7.4 : trigger measurement data and read temperature and humidity
// 0. init i2c
@@ -477,17 +535,19 @@ int main() {
i2c_start();
print_status(" after start");
// print_status("\r\nwaiting 200ms...");
// _delay_ms(200);
// print_status(" done waiting");
// aht20_wait_for_status();
print_status("\r\nwaiting 200ms...");
_delay_ms(200);
print_status(" done waiting");
print_status("\r\nsend SLA+W");
i2c_send_addr_w(SLAVE_ADDRESS);
i2c_send_addr_w(AHT20_ADDRESS);
print_status(" after SLA+W");
// print_status("\r\nwaiting 10ms...");
// _delay_ms(10);
// print_status(" done waiting");
print_status("\r\nwaiting 20ms...");
_delay_ms(20);
print_status(" done waiting");
print_status("\r\nsend 0xAC (trigger measurement)");
i2c_write(0xAC);
@@ -499,29 +559,27 @@ int main() {
i2c_write(0x00);
print_status(" after 0x00");
// print_status("\r\nwaiting 10ms...");
// _delay_ms(10);
// print_status(" done waiting");
print_status("\r\nsend repeat start");
i2c_start_repeat();
print_status(" after repeat start");
print_status("\r\nsend SLA+R");
i2c_send_addr_r(SLAVE_ADDRESS);
print_status(" after SLA+R");
;
print_status("\r\nbefore read data");
uint8_t data;
for (uint8_t i = 0; i < 10; i++) {
data = i2c_read();
print_hex_value(data);
if (i < 9) {
uart_tx(' ');
}
// print_status("\r\nwaiting 100ms...");
// _delay_ms(100);
// print_status(" done waiting");
// aht20_wait_for_status();
print_status("\r\nsend repeat start");
i2c_start_repeat();
print_status(" after repeat start");
print_status("\r\nsend SLA+R");
i2c_send_addr_r(AHT20_ADDRESS);
print_status_anyway(" after SLA+R");
print_status("\r\nbefore read data");
print_data();
print_status(" after read data");
_delay_ms(300);
}
uart_printstr_endl("");
print_status(" after read data");
print_status("\r\nsend stop");
i2c_stop();