didas/incp-test
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fix: Corrected I3C checksum

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This commit is contained in:
Diogo Diniz
2026-04-08 15:38:19 +01:00
parent 3de4ab3af1
commit 06d40aaae0
2 changed files with 5 additions and 1 deletions
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3
app/src/i3c/i3c.c
View File

@@ -6,6 +6,8 @@
#include "checksum.h" #include "checksum.h"
#define OWN_ADDRESS (0x01)
uint8_t i3c_crc(uint8_t dst, uint8_t *msg, size_t len) { uint8_t i3c_crc(uint8_t dst, uint8_t *msg, size_t len) {
uint8_t crc; uint8_t crc;
crc8_init(&crc); crc8_init(&crc);
@@ -25,6 +27,7 @@ bool i3c_validate(uint8_t *msg, size_t len)
uint8_t rcvd_crc8 = msg[2]; uint8_t rcvd_crc8 = msg[2];
msg[2] = 0; msg[2] = 0;
crc8_init(&computed_crc8); crc8_init(&computed_crc8);
crc8_add(&computed_crc8, OWN_ADDRESS);
crc8_addSlice(&computed_crc8, msg, len); crc8_addSlice(&computed_crc8, msg, len);
crc8_finish(&computed_crc8); crc8_finish(&computed_crc8);
msg[2] = rcvd_crc8; msg[2] = rcvd_crc8;

3
app/src/incp_handler.c
View File

@@ -28,6 +28,7 @@ void handle_incp(msg_buf_t *msgs)
// Check I3C // Check I3C
if (!i3c_validate(msg, len)) if (!i3c_validate(msg, len))
{ {
HAL_GPIO_WritePin(LD2_GPIO_Port, LD2_Pin, GPIO_PIN_SET);
//return; // Ignore failed messages //return; // Ignore failed messages
} }
@@ -56,7 +57,7 @@ static void handle_msg(uint8_t sender, uint8_t *bytes, uint32_t len)
bytes[-3] = I2C_OWN_ADDR; bytes[-3] = I2C_OWN_ADDR;
bytes[-2] = len; bytes[-2] = len;
bytes[-1] = i3c_crc(I2C_OWN_ADDR, bytes, len); bytes[-1] = i3c_crc(sender, bytes-I3C_HEADER_SIZE, len+I3C_HEADER_SIZE);
I2C1_transmit_master(sender, bytes-I3C_HEADER_SIZE, len+I3C_HEADER_SIZE); I2C1_transmit_master(sender, bytes-I3C_HEADER_SIZE, len+I3C_HEADER_SIZE);
break; break;