DigitalInfinity/ESP32-PaxCounter
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Merge pull request #201 from der-ambi/SPI_fixes

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some SPI Slave fixes
This commit is contained in:
Verkehrsrot 2018-11-12 11:59:04 +01:00 committed by GitHub
commit dbc3d28d31
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1 changed files with 13 additions and 6 deletions
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17
src/spislave.cpp
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@ -35,7 +35,9 @@ static const char TAG[] = __FILE__;
// https://docs.espressif.com/projects/esp-idf/en/latest/api-reference/peripherals/spi_slave.html
#define BUFFER_SIZE \
(MAX(8, HEADER_SIZE + PAYLOAD_BUFFER_SIZE) + \
(4 - MAX(8, HEADER_SIZE + PAYLOAD_BUFFER_SIZE) % 4))
(PAYLOAD_BUFFER_SIZE % 4 == 0 \
? 0 \
: 4 - MAX(8, HEADER_SIZE + PAYLOAD_BUFFER_SIZE) % 4))
DMA_ATTR uint8_t txbuf[BUFFER_SIZE];
DMA_ATTR uint8_t rxbuf[BUFFER_SIZE];
@ -64,13 +66,17 @@ void spi_slave_task(void *param) {
uint8_t *messageSize = txbuf + 3;
*messageSize = msg.MessageSize;
memcpy(txbuf + HEADER_SIZE, &msg.Message, msg.MessageSize);
// calculate crc16 checksum, not used yet
// uint16_t *crc = (uint16_t *)txbuf;
//*crc = crc16_be(0, messageType, msg.MessageSize + HEADER_SIZE - 2);
// calculate crc16 checksum
uint16_t *crc = (uint16_t *)txbuf;
*crc = crc16_be(0, messageType, msg.MessageSize + HEADER_SIZE - 2);
// set length for spi slave driver
transaction_size = HEADER_SIZE + msg.MessageSize;
// SPI transaction size needs to be at least 8 bytes and dividable by 4, see
// https://docs.espressif.com/projects/esp-idf/en/latest/api-reference/peripherals/spi_slave.html
if (transaction_size % 4 != 0) {
transaction_size += (4 - transaction_size % 4);
}
// prepare spi transaction
spi_slave_transaction_t spi_transaction = {0};
@ -149,7 +155,8 @@ void spi_enqueuedata(uint8_t messageType, MessageBuffer_t *message) {
BaseType_t ret =
xQueueSendToBack(SPISendQueue, (void *)message, (TickType_t)0);
if (ret == pdTRUE) {
ESP_LOGI(TAG, "%d byte(s) enqueued for SPI interface", message->MessageSize);
ESP_LOGI(TAG, "%d byte(s) enqueued for SPI interface",
message->MessageSize);
} else {
ESP_LOGW(TAG, "SPI sendqueue is full");
}