sam3n spi: revert to "end of transmit" interrupt instead of "tx buffer empty",

[bertos.git] / bertos / cpu / cortex-m3 / drv / ser_sam3.c

diff --git a/bertos/cpu/cortex-m3/drv/ser_sam3.c b/bertos/cpu/cortex-m3/drv/ser_sam3.c
index 15b46dd12830cba90cfaba8ffc806cba666ce42d..0c5f8c3988b5124767cb833a581859f2abf663c1 100644 (file)
--- a/bertos/cpu/cortex-m3/drv/ser_sam3.c
+++ b/bertos/cpu/cortex-m3/drv/ser_sam3.c
@@ -185,13 +185,10 @@
        #if CPU_CM3_AT91SAM3
                #define SER_SPI0_BUS_TXINIT do { \
                        /* Disable PIO on SPI pins */ \
-                       PIOA_PDR = BV(SPI0_SPCK) | BV(SPI0_MOSI) | BV(SPI0_MISO) | BV(30); \
+                       PIOA_PDR = BV(SPI0_SPCK) | BV(SPI0_MOSI) | BV(SPI0_MISO); \
                        /* PIO is peripheral A */ \
                        PIOA_ABCDSR1 &= ~(BV(SPI0_SPCK) | BV(SPI0_MOSI) | BV(SPI0_MISO)); \
                        PIOA_ABCDSR2 &= ~(BV(SPI0_SPCK) | BV(SPI0_MOSI) | BV(SPI0_MISO)); \
-                       /* Peripheral B for chip select for display (FIXME: move away from driver) */ \
-                       PIOA_ABCDSR1 |= BV(30); \
-                       PIOA_ABCDSR2 &= ~BV(30); \
                } while (0)
        #else
                #define SER_SPI0_BUS_TXINIT do { \
@@ -540,7 +537,7 @@ static void spi0_init(UNUSED_ARG(struct SerialHardware *, _hw), UNUSED_ARG(struc
         * At reset clock division factor is set to 0, that is
         * *forbidden*. Set SPI clock to minimum to keep it valid.
         * Set all possible chip select registers in case user manually
-        * change chip select.
+        * change CPS field in SPI_MR.
         */
        SPI0_CSR0 = BV(SPI_NCPHA) | (255 << SPI_SCBR_SHIFT);
        SPI0_CSR1 = BV(SPI_NCPHA) | (255 << SPI_SCBR_SHIFT);
@@ -584,7 +581,7 @@ static void spi0_starttx(struct SerialHardware *_hw)
                hw->sending = true;
                SPI0_TDR = fifo_pop(&ser_handles[SER_SPI0]->txfifo);
                /* Enable interrupt on tx buffer empty */
-               SPI0_IER = BV(SPI_TDRE);
+               SPI0_IER = BV(SPI_TXEMPTY);
        }
 
        IRQ_RESTORE(flags);
@@ -662,7 +659,7 @@ static void spi1_starttx(struct SerialHardware *_hw)
                hw->sending = true;
                SPI1_TDR = fifo_pop(&ser_handles[SER_SPI1]->txfifo);
                /* Enable interrupt on tx buffer empty */
-               SPI1_IER = BV(SPI_TDRE);
+               SPI1_IER = BV(SPI_TXEMPTY);
        }
 
        IRQ_RESTORE(flags);
@@ -947,7 +944,7 @@ static DECLARE_ISR(spi0_irq_handler)
        {
                UARTDescs[SER_SPI0].sending = false;
                /* Disable interrupt on tx buffer empty */
-               SPI0_IDR = BV(SPI_TDRE);
+               SPI0_IDR = BV(SPI_TXEMPTY);
        }
 
        SER_INT_ACK;
@@ -981,7 +978,7 @@ static DECLARE_ISR(spi1_irq_handler)
        {
                UARTDescs[SER_SPI1].sending = false;
                /* Disable interrupt on tx buffer empty */
-               SPI1_IDR = BV(SPI_TDRE);
+               SPI1_IDR = BV(SPI_TXEMPTY);
        }
 
        SER_INT_ACK;