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bsp/atsam: Simplify SPI transfer status

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This commit is contained in:
Sebastian Huber
2016-12-14 11:42:28 +01:00
parent de7c17192a
commit 9686c6140f
1 changed files with 9 additions and 7 deletions
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16
c/src/lib/libbsp/arm/atsam/spi/atsam_spi_bus.c
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@@ -36,6 +36,10 @@
#define MAX_SPI_FREQUENCY 50000000
#define TX_IN_PROGRESS 0x1
#define RX_IN_PROGRESS 0x2
typedef struct {
spi_bus base;
bool msg_cs_change;
@@ -47,8 +51,7 @@ typedef struct {
Spid SpiDma;
uint32_t dma_tx_channel;
uint32_t dma_rx_channel;
bool rx_transfer_done;
bool tx_transfer_done;
int transfer_status;
bool chip_select_active;
} atsam_spi_bus;
@@ -269,8 +272,7 @@ static void atsam_spi_setup_transfer(atsam_spi_bus *bus)
{
uint32_t msg_todo = bus->msg_todo;
bus->rx_transfer_done = false;
bus->tx_transfer_done = false;
bus->transfer_status = RX_IN_PROGRESS | TX_IN_PROGRESS;
if (bus->msg_cs_change) {
bus->chip_select_active = false;
@@ -355,14 +357,14 @@ static void atsam_spi_interrupt(void *arg)
}
if (bExec == 1 && (channel == bus->dma_rx_channel)) {
bus->rx_transfer_done = true;
bus->transfer_status &= ~RX_IN_PROGRESS;
XDMAC_DisableGIt(spid->pXdmad->pXdmacs, bus->dma_rx_channel);
} else if (bExec == 1 && (channel == bus->dma_tx_channel)) {
bus->tx_transfer_done = true;
bus->transfer_status &= ~TX_IN_PROGRESS;
XDMAC_DisableGIt(spid->pXdmad->pXdmacs, bus->dma_tx_channel);
}
if (bus->rx_transfer_done && bus->tx_transfer_done) {
if (bus->transfer_status == 0) {
atsam_spi_setup_transfer(bus);
}
}