Silabs Pearl: SPI LDMA descriptor fix

jhokajar · stevew817 · commit ee329e5df737 · 2016-01-12T17:21:23.000+01:00
Changed correct LDMA descriptor for RX.
diff --git a/libraries/mbed/targets/hal/TARGET_Silicon_Labs/TARGET_EFM32/spi_api.c b/libraries/mbed/targets/hal/TARGET_Silicon_Labs/TARGET_EFM32/spi_api.c
@@ -924,7 +924,7 @@ static void spi_activate_dma(spi_t *obj, void* rxdata, const void* txdata, int t
         }
 
         LDMA_TransferCfg_t xferConf = LDMA_TRANSFER_CFG_PERIPHERAL(dma_periph);
-        LDMA_Descriptor_t desc = LDMA_DESCRIPTOR_SINGLE_P2M_BYTE(source_addr, rxdata, rx_length);
+        LDMA_Descriptor_t desc = LDMA_DESCRIPTOR_SINGLE_M2P_BYTE(source_addr, rxdata, rx_length);
         if(obj->spi.bits >= 9){
             desc.xfer.size = ldmaCtrlSizeHalf;
             desc.xfer.srcInc = ldmaCtrlSrcIncTwo;

Original file line number	Diff line number	Diff line change
`@@ -924,7 +924,7 @@ static void spi_activate_dma(spi_t obj, void rxdata, const void* txdata, int t`
`924`	`924`	`}`
`925`	`925`
`926`	`926`	`LDMA_TransferCfg_t xferConf = LDMA_TRANSFER_CFG_PERIPHERAL(dma_periph);`
`927`		`- LDMA_Descriptor_t desc = LDMA_DESCRIPTOR_SINGLE_P2M_BYTE(source_addr, rxdata, rx_length);`
	`927`	`+ LDMA_Descriptor_t desc = LDMA_DESCRIPTOR_SINGLE_M2P_BYTE(source_addr, rxdata, rx_length);`
`928`	`928`	`if(obj->spi.bits >= 9){`
`929`	`929`	`desc.xfer.size = ldmaCtrlSizeHalf;`
`930`	`930`	`desc.xfer.srcInc = ldmaCtrlSrcIncTwo;`