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Add i2c_message_t and use it all across the codebase. This will allow handling variable-length I2C messages and validation with minimal effort. The test LED and brightness PWM update features got temporarily broken and will fix them soon.

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László Monda
2017-09-25 03:03:14 +02:00
parent ef9d9ee9a7
commit b88c6e4291
11 changed files with 93 additions and 60 deletions
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13
shared/crc16.c
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@@ -36,21 +36,20 @@ void crc16_finalize(crc16_data_t *crc16Config, uint16_t *hash)
crc16_data_t crc16data;
void CRC16_AppendToMessage(uint8_t *message, uint32_t lengthInBytes)
void CRC16_UpdateMessageChecksum(i2c_message_t *message)
{
uint16_t hash;
crc16_init(&crc16data);
crc16_update(&crc16data, message, lengthInBytes);
crc16_update(&crc16data, message->data, message->length);
crc16_finalize(&crc16data, &hash);
message[lengthInBytes] = hash & 0xff;
message[lengthInBytes+1] = hash >> 8;
message->crc = hash;
}
bool CRC16_IsMessageValid(uint8_t *message, uint32_t lengthInBytes)
bool CRC16_IsMessageValid(i2c_message_t *message)
{
uint16_t hash;
crc16_init(&crc16data);
crc16_update(&crc16data, message, lengthInBytes);
crc16_update(&crc16data, message->data, message->length);
crc16_finalize(&crc16data, &hash);
return (message[lengthInBytes] == (hash & 0xff)) && (message[lengthInBytes+1] == (hash >> 8));
return message->crc == hash;
}