From 28f0617e489d6c930d1290823b0e185a9d295ad9 Mon Sep 17 00:00:00 2001
From: hugo LAMY <hugo.lamy@oskey.io>
Date: Sun, 16 Mar 2025 10:43:33 +0100
Subject: [PATCH] m06e00 ok

---
 README.md            |  2 +-
 module06/ex00/i2c.c  |  3 +--
 module06/ex00/main.c | 23 +++++++++++++++++++++++
 3 files changed, 25 insertions(+), 3 deletions(-)

diff --git a/README.md b/README.md
index ecc9b6a..10963ac 100644
--- a/README.md
+++ b/README.md
@@ -90,5 +90,5 @@ avrdude done.  Thank you.
 
 ## screen
 
-- (optional) `export XTERM=xterm`
+- (optional) `export TERM=xterm`
 - `screen /dev/ttyUSB0 115200`
diff --git a/module06/ex00/i2c.c b/module06/ex00/i2c.c
index 69d5a4e..2214ab4 100644
--- a/module06/ex00/i2c.c
+++ b/module06/ex00/i2c.c
@@ -2,7 +2,7 @@
 
 #define TWI_PRESCALE_VALUE	1											// can be 1, 4, 16, 64
 #define TWI_FREQ			100000UL									// 100kHz I2C
-#define SLAVE_ADDRESS		42											// 22.3.3 : address 0000000 and 1111xxx are reserved, 42 is 0101010
+#define SLAVE_ADDRESS		0x38										// doc AHT20, 7.3 : address of thermistor
 
 void i2c_init(void) {
     TWSR = TWI_PRESCALE_SET(TWI_PRESCALE_VALUE);						// 22.9.3 : (Status Register) set prescaler
@@ -14,7 +14,6 @@ void i2c_start(void) {
     while (!(TEST(TWCR, TWINT)));										// p225 example code : Wait for TWINT Flag set. This indicates that the START condition has been transmitted
 
 	uint8_t status = TWSR & 0b11111000;									// Table 22-2. Status codes for Master Transmitter Mode
-	uart_printstr_itoa_base_endl(status, 2);
     if (status != TW_START && status != TW_REP_START) {
         TWCR = SEND_STOP_CONDITION;
         return;
diff --git a/module06/ex00/main.c b/module06/ex00/main.c
index bf7606f..5c1bf9e 100644
--- a/module06/ex00/main.c
+++ b/module06/ex00/main.c
@@ -1,11 +1,34 @@
 #include "header.h"
 
+// status before init : 11111000
+// status after init : 11111000
+// status after start : 1000
+// status after stop : 11111000
+
 // description
 int main() {
+	uint8_t status;
+
 	uart_init();
+
+	status = TWSR & 0b11111000;									// Table 22-2. Status codes for Master Transmitter Mode
+	uart_printstr("status before init : ");
+	uart_printstr_itoa_base_endl(status, 2);
+
 	i2c_init();
+	status = TWSR & 0b11111000;									// Table 22-2. Status codes for Master Transmitter Mode
+	uart_printstr("status after init : ");
+	uart_printstr_itoa_base_endl(status, 2);
+
 	i2c_start();
+	status = TWSR & 0b11111000;									// Table 22-2. Status codes for Master Transmitter Mode
+	uart_printstr("status after start : ");
+	uart_printstr_itoa_base_endl(status, 2);
+
 	i2c_stop();
+	status = TWSR & 0b11111000;									// Table 22-2. Status codes for Master Transmitter Mode
+	uart_printstr("status after stop : ");
+	uart_printstr_itoa_base_endl(status, 2);
 
 	while(1);
 }