I have a simple program that uses ADC to convert 2 inputs, I use DMA in circular mode. Everything works great. The only problem I have is that in order to reflash the STM32, I have to first erase the chip. This is only happening when I set the ADC to circular mode.
Hopefully someone can help with this. Thanks!
Here is the code for setting up DMA/ADC
void HAL_ADC_MspInit(ADC_HandleTypeDef *hadc)
{
GPIO_InitTypeDef GPIO_InitStruct = {0};
if (hadc->Instance == ADC1)
{
__HAL_RCC_ADC1_CLK_ENABLE();
GPIO_InitStruct.Pin = GPIO_PIN_0|GPIO_PIN_1;
GPIO_InitStruct.Mode = GPIO_MODE_ANALOG;
GPIO_InitStruct.Pull = GPIO_NOPULL;
HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
hdma_adc1.Instance = DMA2_Stream0;
hdma_adc1.Init.Channel = DMA_CHANNEL_0;
hdma_adc1.Init.Direction = DMA_PERIPH_TO_MEMORY;
hdma_adc1.Init.PeriphInc = DMA_PINC_DISABLE;
hdma_adc1.Init.MemInc = DMA_MINC_ENABLE;
hdma_adc1.Init.PeriphDataAlignment = DMA_PDATAALIGN_HALFWORD;
hdma_adc1.Init.MemDataAlignment = DMA_MDATAALIGN_HALFWORD;
hdma_adc1.Init.Mode = DMA_CIRCULAR;
hdma_adc1.Init.Priority = DMA_PRIORITY_LOW;
hdma_adc1.Init.FIFOMode = DMA_FIFOMODE_ENABLE;
hdma_adc1.Init.FIFOThreshold = DMA_FIFO_THRESHOLD_HALFFULL;
if (HAL_DMA_Init(&hdma_adc1) != HAL_OK)
{
Error_Handler();
}
__HAL_LINKDMA(hadc,DMA_Handle,hdma_adc1);
}
}
void MX_ADC1_Init(void)
{
ADC_ChannelConfTypeDef sConfig = {0};
hadc1.Instance = ADC1;
hadc1.Init.ClockPrescaler = ADC_CLOCK_SYNC_PCLK_DIV4;
hadc1.Init.Resolution = ADC_RESOLUTION_12B;
hadc1.Init.ScanConvMode = ENABLE;
hadc1.Init.ContinuousConvMode = ENABLE;
hadc1.Init.DiscontinuousConvMode = DISABLE;
hadc1.Init.ExternalTrigConvEdge = ADC_EXTERNALTRIGCONVEDGE_NONE;
hadc1.Init.ExternalTrigConv = ADC_SOFTWARE_START;
hadc1.Init.DataAlign = ADC_DATAALIGN_RIGHT;
hadc1.Init.NbrOfConversion = 2;
hadc1.Init.DMAContinuousRequests = ENABLE;
hadc1.Init.EOCSelection = ADC_EOC_SINGLE_CONV;
if (HAL_ADC_Init(&hadc1) != HAL_OK)
{
Error_Handler();
}
sConfig.Channel = ADC_CHANNEL_8;
sConfig.Rank = 1;
sConfig.SamplingTime = ADC_SAMPLETIME_3CYCLES;
if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK)
{
Error_Handler();
}
sConfig.Channel = ADC_CHANNEL_9;
sConfig.Rank = 2;
sConfig.SamplingTime = ADC_SAMPLETIME_3CYCLES;
if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK)
{
Error_Handler();
}
}
And here is the output from jlink. Again, if I erase the chip everything works fine.
/Applications/SEGGER/JLink_V686c/JLinkGDBServerCLExe -select USB -device STM32F401RE -endian
little -if SWD -speed auto -ir -noLocalhostOnly
SEGGER J-Link GDB Server V6.86c Command Line Version
JLinkARM.dll V6.86c (DLL compiled Oct 6 2020 14:16:39)
Command line: -select USB -device STM32F401RE -endian little -if SWD -speed auto -ir -
noLocalhostOnly
-----GDB Server start settings-----
GDBInit file: none
GDB Server Listening port: 2331
SWO raw output listening port: 2332
Terminal I/O port: 2333
Accept remote connection: yes
Generate logfile: off
Verify download: off
Init regs on start: on
Silent mode: off
Single run mode: off
Target connection timeout: 0 ms
------J-Link related settings------
J-Link Host interface: USB
J-Link script: none
J-Link settings file: none
------Target related settings------
Target device: STM32F401RE
Target interface: SWD
Target interface speed: auto
Target endian: little
Connecting to J-Link...
J-Link is connected.
Firmware: J-Link EDU Mini V1 compiled Oct 2 2020 17:00:40
Hardware: V1.00
S/N: 801018944
Feature(s): FlashBP, GDB
Checking target voltage...
Target voltage: 3.28 V
Listening on TCP/IP port 2331
Connecting to target...
Connected to target
Waiting for GDB connection...Connected to 127.0.0.1
Reading all registers
Read 2 bytes @ address 0x0800EF10 (Data = 0xB508)
Read 2 bytes @ address 0x080080A0 (Data = 0x4770)
Read 4 bytes @ address 0x00000000 (Data = 0x20018000)
Read 2 bytes @ address 0x00000000 (Data = 0x8000)
Downloading 408 bytes @ address 0x08000000
Downloading 16048 bytes @ address 0x080001C0
Downloading 16144 bytes @ address 0x08004070
Downloading 16048 bytes @ address 0x08007F80
Downloading 15968 bytes @ address 0x0800BE30
Downloading 16000 bytes @ address 0x0800FC90
Downloading 7876 bytes @ address 0x08013B10
Downloading 5908 bytes @ address 0x080159D8
Downloading 956 bytes @ address 0x080170EC
Downloading 1032 bytes @ address 0x080174A8
Downloading 24 bytes @ address 0x080178B0
Downloading 4 bytes @ address 0x080178C8
Downloading 2496 bytes @ address 0x080178CC
ERROR: Failed to prepare for programming.
RAM check failed @ addr 0x20000E6C.
RAM check failed while testing 0x1050 bytes @ addr 0x200006CC.
Writing register (PC = 0x 800c8f0)
Read 2 bytes @ address 0x0800EF10 (Data = 0xB508)
Read 2 bytes @ address 0x080080A0 (Data = 0x4770)
Received monitor command: reset
Resetting target
Resetting target
Debugger connected to 127.0.0.1:2331
Starting target CPU...
