diff options
Diffstat (limited to 'drivers/touchscreen/MCU/touchscreen_lld.c')
| -rw-r--r-- | drivers/touchscreen/MCU/touchscreen_lld.c | 113 |
1 files changed, 80 insertions, 33 deletions
diff --git a/drivers/touchscreen/MCU/touchscreen_lld.c b/drivers/touchscreen/MCU/touchscreen_lld.c index 46db4fa0..f8c32ffd 100644 --- a/drivers/touchscreen/MCU/touchscreen_lld.c +++ b/drivers/touchscreen/MCU/touchscreen_lld.c @@ -32,16 +32,38 @@ #if GFX_USE_TOUCHSCREEN /*|| defined(__DOXYGEN__)*/
+#define ADC_NUM_CHANNELS 2
+#define ADC_BUF_DEPTH 1
/*===========================================================================*/
/* Driver local variables. */
/*===========================================================================*/
-#if !defined(__DOXYGEN__)
- /* Local copy of the current touchpad driver */
- static const TouchscreenDriver *tsDriver;
-
-#endif
+static const TouchscreenDriver *ts;
+
+static const ADCConversionGroup adc_y_config = {
+ FALSE,
+ ADC_NUM_CHANNELS,
+ NULL,
+ NULL,
+ 0, 0,
+ 0, 0,
+ ADC_SQR1_NUM_CH(ADC_NUM_CHANNELS),
+ 0,
+ ADC_SQR3_SQ2_N(ADC_CHANNEL_IN12) | ADC_SQR3_SQ1_N(ADC_CHANNEL_IN13)
+};
+
+static const ADCConversionGroup adc_x_config = {
+ FALSE,
+ ADC_NUM_CHANNELS,
+ NULL,
+ NULL,
+ 0, 0,
+ 0, 0,
+ ADC_SQR1_NUM_CH(ADC_NUM_CHANNELS),
+ 0,
+ ADC_SQR3_SQ2_N(ADC_CHANNEL_IN10) | ADC_SQR3_SQ1_N(ADC_CHANNEL_IN11)
+};
/**
* @brief Low level Touchscreen driver initialization.
@@ -50,31 +72,10 @@ *
* @notapi
*/
-void ts_lld_init(const TouchscreenDriver *ts) {
- tsDriver = ts;
-
- /* set pins to analog input */
- palSetPadMode(ts->ts_yd_port, ts->ts_yd_pin, PAL_MODE_INPUT_ANALOG);
- palSetPadMode(ts->ts_yu_port, ts->ts_yu_pin, PAL_MODE_INPUT_ANALOG);
- palSetPadMode(ts->ts_xl_port, ts->ts_xl_pin, PAL_MODE_INPUT_ANALOG);
- palSetPadMode(ts->ts_xr_port, ts->ts_xr_pin, PAL_MODE_INPUT_ANALOG);
-}
-
+void ts_lld_init(const TouchscreenDriver *ts_init) {
+ ts = ts_init;
-/**
- * @brief Reads a conversion from the touchscreen
- *
- * @param[in] cmd The command bits to send to the touchscreen
- *
- * @return The read value 12-bit right-justified
- *
- * @note This function only reads data, it is assumed that the pins are
- * configured properly and the bus has been acquired beforehand
- *
- * @notapi
- */
-uint16_t ts_lld_read_value(uint8_t cmd) {
- return 0;
+ adcStart(ts->adc_driver, NULL);
}
/**
@@ -85,6 +86,7 @@ uint16_t ts_lld_read_value(uint8_t cmd) { * @notapi
*/
static void ts_lld_filter(void) {
+
return 0;
}
@@ -96,7 +98,27 @@ static void ts_lld_filter(void) { * @notapi
*/
uint16_t ts_lld_read_x(void) {
- return 0;
+ uint16_t val1, val2;
+ adcsample_t samples[ADC_NUM_CHANNELS * ADC_BUF_DEPTH];
+
+ palSetPadMode(ts->yd_port, ts->yd_pin, PAL_MODE_INPUT_ANALOG);
+ palSetPadMode(ts->yu_port, ts->yu_pin, PAL_MODE_INPUT_ANALOG);
+ palSetPadMode(ts->xl_port, ts->xl_pin, PAL_MODE_OUTPUT_PUSHPULL);
+ palSetPadMode(ts->xr_port, ts->xr_pin, PAL_MODE_OUTPUT_PUSHPULL);
+
+ palSetPad(ts->xl_port, ts->xl_pin);
+ palClearPad(ts->xr_port, ts->xr_pin);
+ chThdSleepMilliseconds(1);
+ adcConvert(&ADCD1, &adc_x_config, samples, ADC_BUF_DEPTH);
+ val1 = ((samples[0] + samples[1])/2);
+
+ palClearPad(ts->xr_port, ts->xr_pin);
+ palSetPad(ts->xl_port, ts->xl_pin);
+ chThdSleepMilliseconds(1);
+ adcConvert(&ADCD1, &adc_x_config, samples, ADC_BUF_DEPTH);
+ val2 = ((samples[0] + samples[1])/2);
+
+ return ((val1+((1<<12)-val2))/4);
}
/**
@@ -105,7 +127,27 @@ uint16_t ts_lld_read_x(void) { * @notapi
*/
uint16_t ts_lld_read_y(void) {
- return 0;
+ uint16_t val1, val2;
+ adcsample_t samples[ADC_NUM_CHANNELS * ADC_BUF_DEPTH];
+
+ palSetPadMode(ts->xl_port, ts->xl_pin, PAL_MODE_INPUT_ANALOG);
+ palSetPadMode(ts->xr_port, ts->xr_pin, PAL_MODE_INPUT_ANALOG);
+ palSetPadMode(ts->yd_port, ts->yd_pin, PAL_MODE_OUTPUT_PUSHPULL);
+ palSetPadMode(ts->yu_port, ts->yu_pin, PAL_MODE_OUTPUT_PUSHPULL);
+
+ palSetPad(ts->yu_port, ts->yu_pin);
+ palClearPad(ts->yd_port, ts->yd_pin);
+ chThdSleepMilliseconds(1);
+ adcConvert(&ADCD1, &adc_y_config, samples, ADC_BUF_DEPTH);
+ val1 = ((samples[0] + samples[1])/2);
+
+ palClearPad(ts->yu_port, ts->yu_pin);
+ palSetPad(ts->yd_port, ts->yd_pin);
+ chThdSleepMilliseconds(1);
+ adcConvert(&ADCD1, &adc_y_config, samples, ADC_BUF_DEPTH);
+ val2 = ((samples[0] + samples[1])/2);
+
+ return ((val1+((1<<12)-val2))/4);
}
/*
@@ -116,9 +158,14 @@ uint16_t ts_lld_read_y(void) { * @notapi
*/
uint8_t ts_lld_pressed(void) {
- return 0;
-}
+ palSetPadMode(ts->yd_port, ts->yd_pin, PAL_MODE_INPUT_PULLDOWN);
+ palSetPadMode(ts->yu_port, ts->yu_pin, PAL_MODE_INPUT);
+ palSetPadMode(ts->xl_port, ts->xl_pin, PAL_MODE_INPUT);
+ palSetPadMode(ts->xr_port, ts->xr_pin, PAL_MODE_OUTPUT_PUSHPULL);
+ palSetPad(ts->xr_port, ts->xr_pin);
+ return palReadPad(ts->yd_port, ts->yd_pin);
+}
#endif /* GFX_USE_TOUCHSCREEN */
/** @} */
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