I am experimenting with DMA on the CYBLE-416045-02 module following the scenario in the MTB CAT1 Peripheral driver library documentation. What I find ...
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I am experimenting with DMA on the CYBLE-416045-02 module following the scenario in the MTB CAT1 Peripheral driver library documentation. What I find is that everything freezes on the call to Cy_DMA_Channel_Init. I have tried the code before and after the __enable_irq() with no difference. I assume the example just copies src to dst. Can anyone explain or help.
Thanks
#include "cy_pdl.h"
#include "cyhal.h"
#include "cybsp.h"
#include "cy_retarget_io.h"
int main(void)
{
/* Scenario: Initialize a 1D descriptor */
#define DATACNT (8UL)
cy_stc_dma_descriptor_t descriptor;
cy_stc_dma_descriptor_t nextDescriptor;
uint32_t src[DATACNT];
uint32_t dst[DATACNT];
cy_stc_dma_descriptor_config_t descriptor_cfg =
{
.retrigger = CY_DMA_RETRIG_IM,
.interruptType = CY_DMA_DESCR,
.triggerOutType = CY_DMA_DESCR,
.channelState = CY_DMA_CHANNEL_ENABLED,
.triggerInType = CY_DMA_DESCR,
.dataSize = CY_DMA_WORD,
.srcTransferSize = CY_DMA_TRANSFER_SIZE_WORD,
.dstTransferSize = CY_DMA_TRANSFER_SIZE_WORD,
.descriptorType = CY_DMA_1D_TRANSFER,
.srcAddress = &src,
.dstAddress = &dst,
.srcXincrement = 1U,
.dstXincrement = 1U,
.xCount = DATACNT,
.srcYincrement = 0U,
.dstYincrement = 0U,
.yCount = 1UL,
.nextDescriptor = &nextDescriptor,
};
cy_rslt_t result;
/* Initialize the device and board peripherals */
result = cybsp_init() ;
if (result != CY_RSLT_SUCCESS)
{
CY_ASSERT(0);
}
/* Initialize retarget-io to use the debug UART port */
result = cy_retarget_io_init(CYBSP_DEBUG_UART_TX, CYBSP_DEBUG_UART_RX, CY_RETARGET_IO_BAUDRATE);
__enable_irq();
if (CY_DMA_SUCCESS != Cy_DMA_Descriptor_Init(&descriptor, &descriptor_cfg))
{
/* Insert error handling */
}
/*Scenario: Setup and enable the DMA channel 0 of block DW0*/
cy_stc_dma_channel_config_t channelConfig;
channelConfig.preemptable = false;
channelConfig.enable = false;
channelConfig.bufferable = false;
if (CY_DMA_SUCCESS != Cy_DMA_Channel_Init(DW0, 0UL, &channelConfig))
{
}
Cy_DMA_Channel_SetDescriptor(DW0, 0UL, &descriptor);
Cy_DMA_Channel_SetPriority(DW0, 0UL, 3UL);
Cy_DMA_Channel_Enable(DW0, 0UL);
Cy_DMA_Enable(DW0);
printf("DMA Test Code\n");
for (;;)
{
}
}
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