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#include "leddrv.h"
#define LED_PINCOUNT (23)
volatile int drive_strength;
typedef enum {
FLOATING,
LOW,
HIGH,
} tristate_t;
typedef struct {
uint32_t *port_buf;
uint32_t *cfg_buf;
uint32_t pin;
} pinctrl_t;
static void gpio_buf_set(pinctrl_t pinctl, tristate_t state)
{
if (state == FLOATING) {
*(pinctl.cfg_buf) &= ~pinctl.pin;
} else {
if (state == HIGH)
*(pinctl.port_buf) |= pinctl.pin;
else
*(pinctl.port_buf) &= ~pinctl.pin;
*(pinctl.cfg_buf) |= pinctl.pin;
}
}
void led_setDriveStrength(int is_20mA)
{
drive_strength = is_20mA;
}
static void gpio_buf_apply(
volatile uint8_t *gpio_base,
uint32_t *port, uint32_t *cfg,
uint32_t *mask)
{
if (drive_strength) {
uint32_t *drv = (uint32_t *)(gpio_base + GPIO_PD_DRV);
*drv = (*drv & ~*mask) | (*cfg & *mask);
}
uint32_t *dir = (uint32_t *)(gpio_base + GPIO_DIR);
*dir = (*dir & ~*mask) | (*cfg & *mask);
uint32_t *out = (uint32_t *)(gpio_base + GPIO_OUT);
*out = (*out & ~*mask) | (*port & *mask);
}
static uint32_t PA_buf;
static uint32_t PB_buf;
static uint32_t PAcfg_buf;
static uint32_t PBcfg_buf;
static uint32_t PA_mask;
static uint32_t PB_mask;
#define GPIO_APPLY_ALL() \
gpio_buf_apply(BA_PA, &PA_buf, &PAcfg_buf, &PA_mask); \
gpio_buf_apply(BA_PB, &PB_buf, &PBcfg_buf, &PB_mask)
#define PINCTRL(x, pin) { \
&P##x##_buf, \
&P##x##cfg_buf, \
GPIO_Pin_##pin \
}
static const pinctrl_t led_pins[LED_PINCOUNT] = {
PINCTRL(A, 15), // A
PINCTRL(B, 18), // B
PINCTRL(B, 0), // C
PINCTRL(B, 7), // D
PINCTRL(A, 12), // E
PINCTRL(A, 10), // F
PINCTRL(A, 11), // G
PINCTRL(B, 9), // H
PINCTRL(B, 8), // I
PINCTRL(B, 15), // J
PINCTRL(B, 14), // K
PINCTRL(B, 13), // L
PINCTRL(B, 12), // M
PINCTRL(B, 5), // N
PINCTRL(A, 4), // O
PINCTRL(B, 3), // P
PINCTRL(B, 4), // Q
PINCTRL(B, 2), // R
PINCTRL(B, 1), // S
#ifdef USBC_VERSION
PINCTRL(B, 6), // T
#else
PINCTRL(B, 23), // T
#endif
PINCTRL(B, 21), // U
PINCTRL(B, 20), // V
PINCTRL(B, 19), // W
};
void led_init()
{
for (int i=0; i<LED_PINCOUNT; i++) {
if (led_pins[i].port_buf == &PA_buf)
PA_mask |= led_pins[i].pin;
else
PB_mask |= led_pins[i].pin;
}
}
void leds_releaseall() {
for (int i=0; i<LED_PINCOUNT; i++)
gpio_buf_set(led_pins[i], FLOATING);
GPIO_APPLY_ALL();
}
static void led_write2dcol_raw(int dcol, uint32_t val)
{
// TODO: assert params
gpio_buf_set(led_pins[dcol], HIGH);
for (int i=0; i<LED_PINCOUNT; i++) {
if (i == dcol) continue;
gpio_buf_set(led_pins[i], (val & 0x01) ? LOW : FLOATING); // danger: floating=0 (led off) or low=1 (led on)
val >>= 1;
}
GPIO_APPLY_ALL();
}
static uint32_t combine_cols(uint16_t col1_val, uint16_t col2_val)
{
uint32_t dval = 0;
dval |= ((col1_val & 0x01) << (LED_ROWS*2));
dval |= ((col2_val & 0x01) << (LED_ROWS*2+1));
for (int i=0; i<LED_ROWS; i++) {
col1_val >>= 1;
col2_val >>= 1;
dval >>= 2;
dval |= ((col1_val & 0x01) << (LED_ROWS*2));
dval |= ((col2_val & 0x01) << (LED_ROWS*2+1));
}
return dval;
}
void led_write2dcol(int dcol, uint16_t col1_val, uint16_t col2_val)
{
// first leds in first two columns are switched
if (dcol == 0) {
uint16_t b1 = col1_val & 0x01;
uint16_t b2 = col2_val & 0x01;
col1_val = (col1_val & 0xFFFE) | b2;
col2_val = (col2_val & 0xFFFE) | b1;
}
led_write2dcol_raw(dcol, combine_cols(col1_val, col2_val));
}
void led_write2row_raw(int row, int which_half, uint32_t val)
{
row = row*2 + (which_half != 0);
gpio_buf_set(led_pins[row], LOW);
for (int i=0; i<LED_PINCOUNT; i++) {
if (i == row) continue;
gpio_buf_set(led_pins[i], (val & 0x01) ? HIGH : FLOATING);
val >>= 1;
}
GPIO_APPLY_ALL();
}
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