Posted on April 16, 2016 at 11:10
Hi all,
I'm trying to use a LCD via the FMC, but as yet i haven't been able to get any output from the FMC module at all. Using normal GPIO pin writes works just fine.
Im using this test code to diagnose the issue.
As far as i can tell, i should be seeing activity on the FMC pins, but im getting nothing at all.
Any ideas??
__FMC_CLK_ENABLE();
__HAL_RCC_GPIOE_CLK_ENABLE();
__HAL_RCC_GPIOD_CLK_ENABLE();
GPIO_InitTypeDef GPIO_InitStruct;
GPIO_InitStruct.Pin = GPIO_PIN_7 | GPIO_PIN_8 | GPIO_PIN_9 | GPIO_PIN_10
| GPIO_PIN_11 | GPIO_PIN_12 | GPIO_PIN_13 | GPIO_PIN_14
| GPIO_PIN_15;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_PULLUP;
GPIO_InitStruct.Speed = GPIO_SPEED_HIGH;
GPIO_InitStruct.Alternate = GPIO_AF12_FMC;
HAL_GPIO_Init(GPIOE, &GPIO_InitStruct);
GPIO_InitStruct.Pin = GPIO_PIN_8 | GPIO_PIN_9 | GPIO_PIN_10 | GPIO_PIN_11
| GPIO_PIN_14 | GPIO_PIN_15 | GPIO_PIN_0 | GPIO_PIN_1 | GPIO_PIN_4
| GPIO_PIN_5 | GPIO_PIN_7;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_PULLUP;
GPIO_InitStruct.Speed = GPIO_SPEED_HIGH;
GPIO_InitStruct.Alternate = GPIO_AF12_FMC;
HAL_GPIO_Init(GPIOD, &GPIO_InitStruct);
FMC_NORSRAM_TimingTypeDef Timing;
FMC_NORSRAM_TimingTypeDef ExtTiming;
hsram1.Instance = FMC_NORSRAM_DEVICE;
hsram1.Extended = FMC_NORSRAM_EXTENDED_DEVICE;
/* hsram1.Init */
hsram1.Init.NSBank = FMC_NORSRAM_BANK1;
hsram1.Init.DataAddressMux = FMC_DATA_ADDRESS_MUX_DISABLE;
hsram1.Init.MemoryType =
FMC_MEMORY_TYPE_SRAM;
hsram1.Init.MemoryDataWidth = FMC_NORSRAM_MEM_BUS_WIDTH_16;
hsram1.Init.BurstAccessMode = FMC_BURST_ACCESS_MODE_DISABLE;
hsram1.Init.WaitSignalPolarity = FMC_WAIT_SIGNAL_POLARITY_LOW;
hsram1.Init.WaitSignalActive = FMC_WAIT_TIMING_BEFORE_WS;
hsram1.Init.WriteOperation = FMC_WRITE_OPERATION_ENABLE;
hsram1.Init.WaitSignal = FMC_WAIT_SIGNAL_DISABLE;
hsram1.Init.ExtendedMode = FMC_EXTENDED_MODE_DISABLE;
//FMC_EXTENDED_MODE_ENABLE;
hsram1.Init.AsynchronousWait = FMC_ASYNCHRONOUS_WAIT_DISABLE;
hsram1.Init.WriteBurst = FMC_WRITE_BURST_DISABLE;
hsram1.Init.ContinuousClock = FMC_CONTINUOUS_CLOCK_SYNC_ONLY;
hsram1.Init.WriteFifo = FMC_WRITE_FIFO_DISABLE;
hsram1.Init.PageSize = FMC_PAGE_SIZE_NONE;
/* Timing */
Timing.AddressSetupTime = 15;
Timing.AddressHoldTime = 15;
Timing.DataSetupTime = 255;
Timing.BusTurnAroundDuration = 15;
Timing.CLKDivision = 16;
Timing.DataLatency = 17;
Timing.AccessMode = FMC_ACCESS_MODE_A;
/* ExtTiming */
ExtTiming.AddressSetupTime = 15;
ExtTiming.AddressHoldTime = 15;
ExtTiming.DataSetupTime = 255;
ExtTiming.BusTurnAroundDuration = 15;
ExtTiming.CLKDivision = 16;
ExtTiming.DataLatency = 17;
ExtTiming.AccessMode = FMC_ACCESS_MODE_A;
HAL_SRAM_Init(&hsram1, &Timing, &ExtTiming);
while
(1)
{
*(
volatile
uint16_t*)(0x60000000) = 0b0101010101010101;
HAL_Delay(10);
HAL_GPIO_TogglePin(LCD_BL_GPIO_Port, LCD_BL_Pin);
*(
volatile
uint16_t*)(0x60000000) = 0b1010101010101010;
HAL_Delay(10);
HAL_GPIO_TogglePin(LCD_BL_GPIO_Port, LCD_BL_Pin);
}
#stm32f7-fmc
