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/*
* adc_task.c
*
*/
#include "com_task.h"
#include "adc_task.h"
#include "fsl_adc16.h"
#include "fsl_port.h"
#include "errno.h"
#include "stdlib.h"
/*
* Apalis ADC0 -> PTB0 -> ADC0_SE8
* Apalis ADC1 -> PTB1 -> ADC0_SE9
* Apalis ADC2 -> PTB2 -> ADC0_SE12
* Apalis ADC3 -> PTB3 -> ADC0_SE13
*
* Touch screen:
* Force:
* PTE6 X+ hi-off
* PTB9 X- lo-off
* PTC5 Y+ hi-off
* PTC13 Y- lo-off
* Sense:
* PTB7 -> ADC1_SE13 X-
* PTB6 -> ADC1_SE12 X+
* PTC9 -> ADC1_SE5b Y-
* PTC8 -> ADC1_SE4b Y+
*/
const uint8_t adc0_channels[ADC0_CHANNEL_CNT] = {8, 9, 12, 13};
const uint8_t tsc_channels[TSC0_CHANNEL_CNT] = {13, 12, 5, 4};
static int adc_task_init(void)
{
adc16_config_t adc_config;
#ifdef BOARD_USES_ADC
ADC16_GetDefaultConfig(&adc_config);
adc_config.resolution = kADC16_ResolutionSE16Bit;
adc_config.longSampleMode = kADC16_LongSampleDisabled;
adc_config.clockDivider = kADC16_ClockDivider8;
ADC16_Init(ADC0, &adc_config);
ADC16_SetHardwareAverage(ADC0, kADC16_HardwareAverageDisabled);
return 0;
#else
return -ENODEV;
#endif
}
static int tsc_task_init(void)
{
adc16_config_t adc_config;
#ifdef BOARD_USES_ADC
ADC16_GetDefaultConfig(&adc_config);
adc_config.resolution = kADC16_ResolutionSE12Bit;
adc_config.longSampleMode = kADC16_LongSampleDisabled;
adc_config.clockDivider = kADC16_ClockDivider8;
ADC16_Init(ADC1, &adc_config);
ADC16_SetChannelMuxMode(ADC1, kADC16_ChannelMuxB);
ADC16_SetHardwareAverage(ADC1, kADC16_HardwareAverageCount32);
return 0;
#else
return -ENODEV;
#endif
}
#ifdef BOARD_USES_ADC
static void ts_force_drive(uint8_t xm, uint8_t xp, uint8_t ym, uint8_t yp)
{
if (xp == 0)
GPIO_SetPinsOutput(GPIOE, 1 << 6);
else
GPIO_ClearPinsOutput(GPIOE, 1 << 6);
if (xm > 0)
GPIO_SetPinsOutput(GPIOB, 1 << 9);
else
GPIO_ClearPinsOutput(GPIOB, 1 << 9);
if (yp == 0)
GPIO_SetPinsOutput(GPIOC, 1 << 5);
else
GPIO_ClearPinsOutput(GPIOC, 1 << 5);
if (ym > 0)
GPIO_SetPinsOutput(GPIOC, 1 << 13);
else
GPIO_ClearPinsOutput(GPIOC, 1 << 13);
}
static inline uint16_t do_adc_conversion(ADC_Type *base, adc16_channel_config_t *channel)
{
ADC16_SetChannelConfig(base, 0, channel);
while(ADC16_GetChannelStatusFlags(base, 0) == 0){vTaskDelay(0);}
return (uint16_t)ADC16_GetChannelConversionValue(base, 0);
}
void adc_task(void *pvParameters)
{
adc16_channel_config_t channel;
int i;
if (adc_task_init() < 0)
return;
channel.enableDifferentialConversion = false;
channel.enableInterruptOnConversionCompleted = false;
while(1) {
for (i = 0; i < ADC0_CHANNEL_CNT;i ++){
channel.channelNumber = adc0_channels[i];
gen_regs.adc[i] = do_adc_conversion(ADC0, &channel);
}
vTaskDelay(1);
}
}
enum touch_status {
PEN_UP,
PEN_DOWN
};
#define MIN_TOUCH_DET 5
/* PTB7 -> ADC1_SE13 X-
* PTB6 -> ADC1_SE12 X+
* PTC9 -> ADC1_SE5b Y-
* PTC8 -> ADC1_SE4b Y+
*/
void tsc_task(void *pvParameters)
{
adc16_channel_config_t channel;
port_pin_config_t pin_config_pd, pin_config_ana;
int old_status, status = PEN_UP;
int irq_stat = 0;
if (tsc_task_init() < 0)
return;
pin_config_pd.mux = kPORT_MuxAsGpio;
pin_config_pd.openDrainEnable = kPORT_OpenDrainDisable;
pin_config_pd.pullSelect = kPORT_PullDown;
pin_config_pd.slewRate = kPORT_FastSlewRate;
pin_config_pd.passiveFilterEnable = kPORT_PassiveFilterDisable;
pin_config_pd.driveStrength = kPORT_LowDriveStrength;
pin_config_pd.lockRegister = kPORT_UnlockRegister;
pin_config_ana.mux = kPORT_PinDisabledOrAnalog;
pin_config_ana.openDrainEnable = kPORT_OpenDrainDisable;
pin_config_ana.pullSelect = kPORT_PullDisable;
pin_config_ana.slewRate = kPORT_FastSlewRate;
pin_config_ana.passiveFilterEnable = kPORT_PassiveFilterDisable;
pin_config_ana.driveStrength = kPORT_LowDriveStrength;
pin_config_ana.lockRegister = kPORT_UnlockRegister;
channel.enableDifferentialConversion = false;
channel.enableInterruptOnConversionCompleted = false;
while(1) {
//Touch detect power Y+, enable pulldown on xp and read xp GPIO
ts_force_drive(0, 0, 0, 1);
PORT_SetPinConfig(PORTB, 6u, &pin_config_pd);
vTaskDelay(10);
old_status = status;
status = GPIO_ReadPinInput(GPIOB, 6u) ? PEN_DOWN:PEN_UP;
PORT_SetPinConfig(PORTB, 6u, &pin_config_ana);
if (status != old_status)
irq_stat = 0;
if (status == PEN_DOWN) {
//probe ym with power across Y plane
ts_force_drive(0, 0, 1, 1);
vTaskDelay(10);
channel.channelNumber = tsc_channels[0];
gen_regs.tsc_ym = do_adc_conversion(ADC1, &channel);
//probe yp with power across Y plane
channel.channelNumber = tsc_channels[1];
gen_regs.tsc_yp = do_adc_conversion(ADC1, &channel);
//probe xm with power across X plane
ts_force_drive(1, 1, 0, 0);
vTaskDelay(10);
channel.channelNumber = tsc_channels[2];
gen_regs.tsc_xm = do_adc_conversion(ADC1, &channel);
//probe xp with power across X plane
channel.channelNumber = tsc_channels[3];
gen_regs.tsc_xp = do_adc_conversion(ADC1, &channel);
if (irq_stat == 0) {
generate_irq(APALIS_TK1_K20_TSC_IRQ);
irq_stat = 1;
}
} else {
gen_regs.tsc_xm = 0;
gen_regs.tsc_xp = 0;
gen_regs.tsc_ym = 0;
gen_regs.tsc_yp = 0;
vTaskDelay(20);
if (irq_stat == 0) {
generate_irq(APALIS_TK1_K20_TSC_IRQ);
irq_stat = 1;
}
}
vTaskDelay(10);
}
}
int tsc_registers(uint8_t *rx_buf, uint8_t *tx_buf)
{
if (rx_buf[0] == APALIS_TK1_K20_READ_INST) {
switch (rx_buf[1]) {
case APALIS_TK1_K20_TSCREG:
tx_buf[0] = 0x00;
return 1;
case APALIS_TK1_K20_TSC_XML:
tx_buf[0] = gen_regs.tsc_xm & 0xFF;
return 1;
case APALIS_TK1_K20_TSC_XMH:
tx_buf[0] = (gen_regs.tsc_xm >> 8) & 0xFF;
return 1;
case APALIS_TK1_K20_TSC_XPL:
tx_buf[0] = gen_regs.tsc_xp & 0xFF;
return 1;
case APALIS_TK1_K20_TSC_XPH:
tx_buf[0] = (gen_regs.tsc_xp >> 8) & 0xFF;
return 1;
case APALIS_TK1_K20_TSC_YML:
tx_buf[0] = gen_regs.tsc_ym & 0xFF;
return 1;
case APALIS_TK1_K20_TSC_YMH:
tx_buf[0] = (gen_regs.tsc_ym >> 8) & 0xFF;
return 1;
case APALIS_TK1_K20_TSC_YPL:
tx_buf[0] = gen_regs.tsc_yp & 0xFF;
return 1;
case APALIS_TK1_K20_TSC_YPH:
tx_buf[0] = (gen_regs.tsc_yp >> 8) & 0xFF;
return 1;
default:
return -ENOENT;
}
} else if (rx_buf[0] == APALIS_TK1_K20_WRITE_INST) {
switch (rx_buf[1]) {
case APALIS_TK1_K20_TSCREG:
return -ENOENT;
default:
return -ENOENT;
}
} else if (rx_buf[0] == APALIS_TK1_K20_BULK_READ_INST) {
switch (rx_buf[1]){
case APALIS_TK1_K20_TSC_XML:
tx_buf[0] = gen_regs.tsc_xm & 0xFF;
tx_buf[1] = (gen_regs.tsc_xm >> 8) & 0xFF;
return 2;
case APALIS_TK1_K20_TSC_XPL:
tx_buf[0] = gen_regs.tsc_xp & 0xFF;
tx_buf[1] = (gen_regs.tsc_xp >> 8) & 0xFF;
return 2;
case APALIS_TK1_K20_TSC_YML:
tx_buf[0] = gen_regs.tsc_ym & 0xFF;
tx_buf[1] = (gen_regs.tsc_ym >> 8) & 0xFF;
return 2;
case APALIS_TK1_K20_TSC_YPL:
tx_buf[0] = gen_regs.tsc_yp & 0xFF;
tx_buf[1] = (gen_regs.tsc_yp >> 8) & 0xFF;
return 2;
default:
return -ENOENT;
}
}
return -ENOENT;
}
int adc_registers(uint8_t *rx_buf, uint8_t *tx_buf)
{
if (rx_buf[0] == APALIS_TK1_K20_READ_INST) {
switch (rx_buf[1]) {
case APALIS_TK1_K20_ADCREG:
tx_buf[0] = 0x00;
return 1;
case APALIS_TK1_K20_ADC_CH0L:
tx_buf[0] = gen_regs.adc[0] & 0xFF;
return 1;
case APALIS_TK1_K20_ADC_CH0H:
tx_buf[0] = (gen_regs.adc[0] >> 8) & 0xFF;
return 1;
case APALIS_TK1_K20_ADC_CH1L:
tx_buf[0] = gen_regs.adc[1] & 0xFF;
return 1;
case APALIS_TK1_K20_ADC_CH1H:
tx_buf[0] = (gen_regs.adc[1] >> 8) & 0xFF;
return 1;
case APALIS_TK1_K20_ADC_CH2L:
tx_buf[0] = gen_regs.adc[2] & 0xFF;
return 1;
case APALIS_TK1_K20_ADC_CH2H:
tx_buf[0] = (gen_regs.adc[2] >> 8) & 0xFF;
return 1;
case APALIS_TK1_K20_ADC_CH3L:
tx_buf[0] = gen_regs.adc[3] & 0xFF;
return 1;
case APALIS_TK1_K20_ADC_CH3H:
tx_buf[0] = (gen_regs.adc[3] >> 8) & 0xFF;
return 1;
default:
return -ENOENT;
}
} else if (rx_buf[0] == APALIS_TK1_K20_WRITE_INST) {
switch (rx_buf[1]) {
case APALIS_TK1_K20_ADCREG:
return -ENOENT;
default:
return -ENOENT;
}
} else if (rx_buf[0] == APALIS_TK1_K20_BULK_READ_INST) {
switch (rx_buf[1]){
case APALIS_TK1_K20_ADC_CH0L:
tx_buf[0] = gen_regs.adc[0] & 0xFF;
tx_buf[1] = (gen_regs.adc[0] >> 8) & 0xFF;
return 2;
case APALIS_TK1_K20_ADC_CH1L:
tx_buf[0] = gen_regs.adc[1] & 0xFF;
tx_buf[1] = (gen_regs.adc[1] >> 8) & 0xFF;
return 2;
case APALIS_TK1_K20_ADC_CH2L:
tx_buf[0] = gen_regs.adc[2] & 0xFF;
tx_buf[1] = (gen_regs.adc[2] >> 8) & 0xFF;
return 2;
case APALIS_TK1_K20_ADC_CH3L:
tx_buf[0] = gen_regs.adc[3] & 0xFF;
tx_buf[1] = (gen_regs.adc[3] >> 8) & 0xFF;
return 2;
default:
return -ENOENT;
}
}
return -ENOENT;
}
#endif
|
