[spi] increase max size for spi buffer length (8bits to 16bits)

KevinC1 · Feb 10, 2015 · c2576c3 · c2576c3
1 parent 605527b
commit c2576c3
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Showing 3 changed files with 4 additions and 4 deletions.
diff --git a/sw/airborne/arch/linux/mcu_periph/spi_arch.c b/sw/airborne/arch/linux/mcu_periph/spi_arch.c
@@ -50,7 +50,7 @@ bool_t spi_submit(struct spi_periph *p, struct spi_transaction *t)
   memset(&xfer, 0, sizeof xfer);
 
   /* length in bytes of transaction */
-  uint8_t buf_len = Max(t->input_length, t->output_length);
+  uint16_t buf_len = Max(t->input_length, t->output_length);
 
   /* handle transactions with different input/output length */
   if (buf_len > t->output_length) {

diff --git a/sw/airborne/arch/lpc21/mcu_periph/spi_arch.c b/sw/airborne/arch/lpc21/mcu_periph/spi_arch.c
@@ -199,7 +199,7 @@ __attribute__((always_inline)) static inline void SpiTransmit(struct spi_periph
 {
   // when all byte are sent, continue until tx_idx reach input_length
   // needed when input_length is bigger than output_length
-  uint8_t max_idx = Max(t->output_length, t->input_length);
+  uint16_t max_idx = Max(t->output_length, t->input_length);
   while (p->tx_idx_buf < max_idx && bit_is_set(((sspRegs_t *)(p->reg_addr))->sr, TNF)) {
     if (p->tx_idx_buf < t->output_length) {
       if (t->dss == SPIDss8bit) {

diff --git a/sw/airborne/mcu_periph/spi.h b/sw/airborne/mcu_periph/spi.h
@@ -142,8 +142,8 @@ typedef void (*SPICallback)(struct spi_transaction *trans);
 struct spi_transaction {
   volatile uint8_t *input_buf;  ///< pointer to receive buffer for DMA
   volatile uint8_t *output_buf; ///< pointer to transmit buffer for DMA
-  uint8_t input_length;         ///< number of data words to read
-  uint8_t output_length;        ///< number of data words to write
+  uint16_t input_length;        ///< number of data words to read
+  uint16_t output_length;       ///< number of data words to write
   uint8_t slave_idx;            ///< slave id: #SPI_SLAVE0 to #SPI_SLAVE4
   enum SPISlaveSelect select;   ///< slave selection behavior
   enum SPIClockPolarity cpol;   ///< clock polarity control