contrib/firmware: add 'send not acknowledged' function to the i2c bit…

…-banging implementation Change-Id: I60597ebc126da4acb00654513b96f52261253e12 Signed-off-by: Ahmed BOUDJELIDA <[email protected]> Reviewed-on: https://review.openocd.org/c/openocd/+/7811 Tested-by: jenkins Reviewed-by: Antonio Borneo <[email protected]>
openocd-org · Nov 18, 2023 · bb27677 · bb27677
1 parent a69a4e2
commit bb27677
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diff --git a/contrib/firmware/angie/c/include/i2c.h b/contrib/firmware/angie/c/include/i2c.h
@@ -19,6 +19,7 @@ void repeated_start(void);
 void stop_cd(void);
 void clock_cd(void);
 void send_ack(void);
+void send_nack(void);
 bool get_ack(void);
 
 uint8_t get_address(uint8_t adr, uint8_t rdwr);

diff --git a/contrib/firmware/angie/c/src/i2c.c b/contrib/firmware/angie/c/src/i2c.c
@@ -60,6 +60,16 @@ void send_ack(void)
 	delay_us(1);
 }
 
+void send_nack(void)
+{
+	PIN_SDA = 1;
+	delay_us(1);
+	PIN_SCL = 1;
+	delay_us(1);
+	PIN_SCL = 0;
+	delay_us(1);
+}
+
 bool get_ack(void)
 {
 	PIN_SDA_DIR = 1;

diff --git a/contrib/firmware/angie/c/src/usb.c b/contrib/firmware/angie/c/src/usb.c
@@ -798,6 +798,9 @@ void i2c_recieve(void)
 
 		EP8FIFOBUF[count - 1] = receive_byte();
 
+		/*  send Nack:  */
+		send_nack();
+
 		/*   stop   */
 		stop_cd();