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driver/hd44780: cleanup param definition and HD44780_RW_OFF

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There's already a macro for undefined gpios: GPIO_UNDEF
This commit is contained in:
Alexandre Abadie 2019-10-22 16:33:34 +02:00
parent 04dc65f6ad
commit 8e70cfb2e4
No known key found for this signature in database
GPG Key ID: 1C919A403CAE1405
3 changed files with 40 additions and 22 deletions
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10
drivers/hd44780/hd44780.c
View File

@ -72,7 +72,7 @@ static void _send(const hd44780_t *dev, uint8_t value, hd44780_state_t state)
{
(state == HD44780_ON) ? gpio_set(dev->p.rs) : gpio_clear(dev->p.rs);
/* if RW pin is available, set it to LOW */
if (dev->p.rw != HD44780_RW_OFF) {
if (dev->p.rw != GPIO_UNDEF) {
gpio_clear(dev->p.rw);
}
/* write data in 8Bit or 4Bit mode */
@ -111,7 +111,7 @@ int hd44780_init(hd44780_t *dev, const hd44780_params_t *params)
uint8_t count_pins = 0;
/* check which pins are used */
for (unsigned i = 0; i < HD44780_MAX_PINS; ++i) {
if (dev->p.data[i] != HD44780_RW_OFF) {
if (dev->p.data[i] != GPIO_UNDEF) {
++count_pins;
}
}
@ -138,8 +138,8 @@ int hd44780_init(hd44780_t *dev, const hd44780_params_t *params)
dev->roff[3] = 0x40 + dev->p.cols;
gpio_init(dev->p.rs, GPIO_OUT);
/* RW (read/write) of LCD not required, set it to HD44780_RW_OFF (255) */
if (dev->p.rw != HD44780_RW_OFF) {
/* RW (read/write) of LCD not required, set it to GPIO_UNDEF */
if (dev->p.rw != GPIO_UNDEF) {
gpio_init(dev->p.rw, GPIO_OUT);
}
gpio_init(dev->p.enable, GPIO_OUT);
@ -151,7 +151,7 @@ int hd44780_init(hd44780_t *dev, const hd44780_params_t *params)
xtimer_usleep(HD44780_INIT_WAIT_XXL);
gpio_clear(dev->p.rs);
gpio_clear(dev->p.enable);
if (dev->p.rw != HD44780_RW_OFF) {
if (dev->p.rw != GPIO_UNDEF) {
gpio_clear(dev->p.rw);
}
/* put the LCD into 4 bit or 8 bit mode */

47
drivers/hd44780/include/hd44780_params.h
View File

@ -21,29 +21,52 @@
#include "board.h"
#include "periph/gpio.h"
#include "hd44780.h"
#ifdef __cplusplus
extern "C"
{
#endif
#define HD44780_PARAMS_ARDUINO { \
.cols = 16, \
.rows = 2, \
.rs = ARDUINO_PIN_2, \
.rw = HD44780_RW_OFF, \
.enable = ARDUINO_PIN_3, \
.data = {ARDUINO_PIN_4, ARDUINO_PIN_5, ARDUINO_PIN_6, ARDUINO_PIN_7, \
HD44780_RW_OFF, HD44780_RW_OFF, HD44780_RW_OFF, HD44780_RW_OFF} \
}
#ifndef HD44780_PARAM_COLS
#define HD44780_PARAM_COLS (16U)
#endif
#ifndef HD44780_PARAM_ROWS
#define HD44780_PARAM_ROWS (2U)
#endif
#ifndef HD44780_PARAM_PIN_RS
#define HD44780_PARAM_PIN_RS ARDUINO_PIN_2
#endif
#ifndef HD44780_PARAM_PIN_RW
#define HD44780_PARAM_PIN_RW GPIO_UNDEF
#endif
#ifndef HD44780_PARAM_PIN_ENABLE
#define HD44780_PARAM_PIN_ENABLE ARDUINO_PIN_3
#endif
#ifndef HD44780_PARAM_PINS_DATA
#define HD44780_PARAM_PINS_DATA { ARDUINO_PIN_4, \
ARDUINO_PIN_5, \
ARDUINO_PIN_6, \
ARDUINO_PIN_7, \
GPIO_UNDEF, \
GPIO_UNDEF, \
GPIO_UNDEF, \
GPIO_UNDEF }
#endif
#ifndef HD44780_PARAMS
#define HD44780_PARAMS { .cols = HD44780_PARAM_COLS, \
.rows = HD44780_PARAM_ROWS, \
.rs = HD44780_PARAM_PIN_RS, \
.rw = HD44780_PARAM_PIN_RW, \
.enable = HD44780_PARAM_PIN_ENABLE, \
.data = HD44780_PARAM_PINS_DATA }
#endif
/**
* @brief LCM1602C configuration
*/
static const hd44780_params_t hd44780_params[] =
{
HD44780_PARAMS_ARDUINO,
HD44780_PARAMS,
};
#ifdef __cplusplus

5
drivers/include/hd44780.h
View File

@ -46,11 +46,6 @@ extern "C" {
*/
#define HD44780_MAX_PINS (8U)
/**
* @brief Specific value to turn rw pin off, if unused.
*/
#define HD44780_RW_OFF (255U)
/**
* @brief Size of RAM for custom chars
*