tom dunigan / Mbed 2 deprecated L476_touch

attempt at TSC on STM32L4. not working

Dependencies:   mbed

main.cpp@0:6cc44b2a3d49, 2016-06-01 (annotated)

Committer:
manitou
Date:
Wed Jun 01 00:05:21 2016 +0000
Revision:
0:6cc44b2a3d49
first try at TSC (not working)

Who changed what in which revision?

UserRevisionLine numberNew contents of line
manitou 0:6cc44b2a3d49 1 // capacitive touch TSC
manitou 0:6cc44b2a3d49 2 // select cap pin and sensor pin in same group datasheet table 17
manitou 0:6cc44b2a3d49 3 // http://www.codeforge.com/read/253659/bsp.c__html
manitou 0:6cc44b2a3d49 4
manitou 0:6cc44b2a3d49 5 #include "mbed.h"
manitou 0:6cc44b2a3d49 6 #include "PeripheralPins.h"
manitou 0:6cc44b2a3d49 7 TSC_HandleTypeDef TscHandle;
manitou 0:6cc44b2a3d49 8 const PinMap PinMap_TSC[] = {
manitou 0:6cc44b2a3d49 9 {PB_6, (int)TSC, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_NOPULL, 9)}, // AF9 OUTPUT or AF?
manitou 0:6cc44b2a3d49 10 {PB_7, (int)TSC, STM_PIN_DATA(STM_MODE_AF_OD, GPIO_NOPULL, 9)}, // need capacitor
manitou 0:6cc44b2a3d49 11 {NC, NC, 0}
manitou 0:6cc44b2a3d49 12 };
manitou 0:6cc44b2a3d49 13
manitou 0:6cc44b2a3d49 14 #define PRREG(z) printf(#z" 0x%x\n",z)
manitou 0:6cc44b2a3d49 15 Timer tmr;
manitou 0:6cc44b2a3d49 16
manitou 0:6cc44b2a3d49 17 main() {
manitou 0:6cc44b2a3d49 18 tmr.start();
manitou 0:6cc44b2a3d49 19 __HAL_RCC_TSC_CLK_ENABLE(); // enable TSC
manitou 0:6cc44b2a3d49 20 // enable GPIO and config pins
manitou 0:6cc44b2a3d49 21 __HAL_RCC_GPIOB_CLK_ENABLE();
manitou 0:6cc44b2a3d49 22 //HAL_GPIO_Init(); // mux function 9
manitou 0:6cc44b2a3d49 23 pin_function(PB_6,pinmap_find_function(PB_6,PinMap_TSC));
manitou 0:6cc44b2a3d49 24 pin_function(PB_7,pinmap_find_function(PB_7,PinMap_TSC));
manitou 0:6cc44b2a3d49 25
manitou 0:6cc44b2a3d49 26 TscHandle.Instance = TSC;
manitou 0:6cc44b2a3d49 27 TscHandle.Init.AcquisitionMode = TSC_ACQ_MODE_NORMAL;
manitou 0:6cc44b2a3d49 28 TscHandle.Init.CTPulseHighLength = TSC_CTPH_2CYCLES;
manitou 0:6cc44b2a3d49 29 TscHandle.Init.CTPulseLowLength = TSC_CTPL_2CYCLES;
manitou 0:6cc44b2a3d49 30 TscHandle.Init.IODefaultMode = TSC_IODEF_IN_FLOAT;
manitou 0:6cc44b2a3d49 31 TscHandle.Init.MaxCountInterrupt = DISABLE;
manitou 0:6cc44b2a3d49 32 TscHandle.Init.MaxCountValue = TSC_MCV_8191;
manitou 0:6cc44b2a3d49 33 TscHandle.Init.PulseGeneratorPrescaler = TSC_PG_PRESC_DIV32;
manitou 0:6cc44b2a3d49 34 TscHandle.Init.SpreadSpectrum = DISABLE;
manitou 0:6cc44b2a3d49 35 TscHandle.Init.SpreadSpectrumDeviation = 127;
manitou 0:6cc44b2a3d49 36 TscHandle.Init.SpreadSpectrumPrescaler = TSC_SS_PRESC_DIV1;
manitou 0:6cc44b2a3d49 37 TscHandle.Init.SynchroPinPolarity = TSC_SYNC_POL_FALL;
manitou 0:6cc44b2a3d49 38 /* All channel, shield and sampling IOs must be declared below */
manitou 0:6cc44b2a3d49 39 TscHandle.Init.ChannelIOs = TSC_GROUP2_IO3; // PB6 output push-pull sensor
manitou 0:6cc44b2a3d49 40 TscHandle.Init.SamplingIOs = TSC_GROUP2_IO4; // PB7 output open drain need capacitor
manitou 0:6cc44b2a3d49 41 TscHandle.Init.ShieldIOs = 0;
manitou 0:6cc44b2a3d49 42 HAL_TSC_Init(&TscHandle);
manitou 0:6cc44b2a3d49 43 PRREG(GPIOB->MODER);
manitou 0:6cc44b2a3d49 44 PRREG(GPIOB->OTYPER);
manitou 0:6cc44b2a3d49 45 PRREG(GPIOB->PUPDR);
manitou 0:6cc44b2a3d49 46 PRREG(GPIOB->AFR[0]);
manitou 0:6cc44b2a3d49 47 PRREG(GPIOB->AFR[1]);
manitou 0:6cc44b2a3d49 48 PRREG(TSC->CR);
manitou 0:6cc44b2a3d49 49 PRREG(TSC->IOASCR);
manitou 0:6cc44b2a3d49 50 PRREG(TSC->IOSCR);
manitou 0:6cc44b2a3d49 51 PRREG(TSC->IOCCR);
manitou 0:6cc44b2a3d49 52
manitou 0:6cc44b2a3d49 53 while(1) {
manitou 0:6cc44b2a3d49 54 uint32_t us = tmr.read_us();
manitou 0:6cc44b2a3d49 55 HAL_TSC_Start(&TscHandle);
manitou 0:6cc44b2a3d49 56 HAL_TSC_PollForAcquisition(&TscHandle);
manitou 0:6cc44b2a3d49 57 uint32_t val = HAL_TSC_GroupGetValue(&TscHandle,1); // group 2 0 to 7 or 1 to 8
manitou 0:6cc44b2a3d49 58 us=tmr.read_us() - us;
manitou 0:6cc44b2a3d49 59 int avrg=0;
manitou 0:6cc44b2a3d49 60 for(int i=0;i<100;i++) {
manitou 0:6cc44b2a3d49 61 HAL_TSC_Start(&TscHandle);
manitou 0:6cc44b2a3d49 62 HAL_TSC_PollForAcquisition(&TscHandle);
manitou 0:6cc44b2a3d49 63 avrg += HAL_TSC_GroupGetValue(&TscHandle,1);
manitou 0:6cc44b2a3d49 64 }
manitou 0:6cc44b2a3d49 65 printf("%d %d us avrg %d\n",val,us,avrg/100);
manitou 0:6cc44b2a3d49 66 PRREG(TSC->IOGCSR);
manitou 0:6cc44b2a3d49 67 wait(2.0);
manitou 0:6cc44b2a3d49 68 }
manitou 0:6cc44b2a3d49 69
manitou 0:6cc44b2a3d49 70 }