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impl_gpio.c

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impl_gpio.c

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#include "devs_internal.h"
#include "services/interfaces/jd_pins.h"
#include "services/interfaces/jd_hw_pwr.h"
#include "jacdac/dist/c/gpio.h"
#include "services/interfaces/jd_adc.h"
#define LOG_TAG "GPIO"
// #define VLOGGING 1
#include "devs_logging.h"
#ifndef JD_MAX_PIN_NUM
#define JD_MAX_PIN_NUM 64
#endif
static uint8_t usedpins[JD_MAX_PIN_NUM / 8];
#define MAX_PIN (sizeof(usedpins) * 8 - 1)
static void init_used(void) {
const dcfg_entry_t *info = NULL;
memset(usedpins, 0, sizeof(usedpins));
for (;;) {
info = dcfg_get_next_entry("", info);
if (info == NULL)
break;
const char *p = strstr(info->key, "pin");
if (p && p > info->key && (p[-1] == '.' || (uint8_t)p[-1] >= 0x80)) {
unsigned pin = dcfg_get_pin(info->key);
if (pin != NO_PIN && pin < (sizeof(usedpins) * 8)) {
usedpins[pin / 8] |= 1 << (pin & 7);
}
}
}
LOG("init used done");
}
static bool is_pin_used(int gpio) {
if (gpio == NO_PIN || gpio < 0 || gpio >= (int)MAX_PIN)
return false;
return (usedpins[gpio / 8] & (1 << (gpio & 7))) != 0;
}
static bool valid_pin(const char *name) {
if (name[5] == '@')
return false;
int gpio = dcfg_get_pin(name);
return gpio != NO_PIN && !is_pin_used(gpio);
}
void devs_gpio_init_dcfg(devs_ctx_t *ctx) {
if (ctx != NULL) {
if (ctx->pin_state)
return;
init_used();
unsigned num_pins = 0;
const dcfg_entry_t *info = NULL;
for (;;) {
info = dcfg_get_next_entry("pins.", info);
if (info == NULL)
break;
if (valid_pin(info->key))
num_pins++;
}
LOG("init: %d pins", num_pins);
ctx->pin_state = devs_try_alloc(ctx, num_pins * sizeof(devs_pin_state_t));
if (!ctx->pin_state)
return;
ctx->num_pins = num_pins;
} else {
init_used();
}
unsigned idx = 0;
const dcfg_entry_t *info = NULL;
for (;;) {
info = dcfg_get_next_entry("pins.", info);
if (info == NULL)
break;
int gpio = dcfg_get_pin(info->key);
char keybuf[DCFG_KEYSIZE + 1];
memcpy(keybuf, info->key, sizeof(keybuf));
memcpy(keybuf, "sPin", 4);
int init_val = dcfg_get_i32(keybuf, -1);
if (init_val == 0 || init_val == 1) {
LOG("%s(%d) set to %d", keybuf, gpio, init_val);
#if !JD_HOSTED
pin_set(gpio, init_val);
pin_setup_output(gpio);
#endif
} else if (is_pin_used(gpio)) {
LOG("skip %s -> %d (used)", info->key + 5, gpio);
}
if (!valid_pin(info->key))
continue;
if (ctx && ctx->pin_state) {
JD_ASSERT(idx <= ctx->num_pins);
devs_pin_state_t *p = &ctx->pin_state[idx];
p->label = info->key + 5;
p->id = idx;
p->gpio = gpio;
LOG("init[%u] %s -> %d (=%d)", p->id, p->label, p->gpio, init_val);
p->capabilities = JD_GPIO_CAPABILITIES_PULL_UP | JD_GPIO_CAPABILITIES_PULL_DOWN |
JD_GPIO_CAPABILITIES_INPUT | JD_GPIO_CAPABILITIES_OUTPUT;
#if JD_ANALOG
if (adc_can_read_pin(gpio))
p->capabilities |= JD_GPIO_CAPABILITIES_ANALOG;
#endif
if (init_val == -1) {
#if !JD_HOSTED
pin_setup_analog_input(gpio);
#endif
p->mode = JD_GPIO_MODE_OFF;
} else {
p->mode = init_val ? JD_GPIO_MODE_OUTPUT_HIGH : JD_GPIO_MODE_OUTPUT_LOW;
}
}
idx++;
}
if (ctx == NULL)
return;
devs_map_t *map = (devs_map_t *)devs_get_builtin_object(ctx, DEVS_BUILTIN_OBJECT_GPIO);
JD_ASSERT(devs_is_map(map));
for (idx = 0; idx < ctx->num_pins; ++idx) {
devs_pin_state_t *p = &ctx->pin_state[idx];
p->obj = devs_value_from_gc_obj(
ctx, devs_map_try_alloc(
ctx, devs_get_builtin_object(ctx, DEVS_BUILTIN_OBJECT_GPIO_PROTOTYPE)));
// set fields for nicer debug output
devs_any_set(ctx, p->obj, devs_builtin_string(DEVS_BUILTIN_STRING_GPIO),
devs_value_from_int(p->gpio));
value_t lbl = devs_value_from_gc_obj(
ctx, devs_string_try_alloc_init(ctx, p->label, strlen(p->label)));
devs_value_pin(ctx, lbl);
devs_any_set(ctx, p->obj, devs_builtin_string(DEVS_BUILTIN_STRING_LABEL), lbl);
// store it in GPIO object
devs_map_set(ctx, map, lbl, p->obj);
devs_value_unpin(ctx, lbl);
}
}
static devs_pin_state_t *get_pin(devs_ctx_t *ctx, value_t self) {
for (unsigned i = 0; i < ctx->num_pins; ++i) {
if (ctx->pin_state[i].obj.u64 == self.u64)
return &ctx->pin_state[i];
}
devs_throw_expecting_error(ctx, DEVS_BUILTIN_STRING_GPIO, self);
return NULL;
}
value_t prop_GPIO_mode(devs_ctx_t *ctx, value_t self) {
devs_pin_state_t *p = get_pin(ctx, self);
return p ? devs_value_from_int(p->mode) : devs_undefined;
}
value_t prop_GPIO_capabilities(devs_ctx_t *ctx, value_t self) {
devs_pin_state_t *p = get_pin(ctx, self);
return p ? devs_value_from_int(p->capabilities) : devs_undefined;
}
value_t prop_GPIO_value(devs_ctx_t *ctx, value_t self) {
devs_pin_state_t *p = get_pin(ctx, self);
if (!p)
return devs_undefined;
#if JD_HOSTED
return devs_undefined;
#else
int m = p->mode & JD_GPIO_MODE_BASE_MODE_MASK;
if (m == JD_GPIO_MODE_INPUT) {
return devs_value_from_int(pin_get(p->gpio));
#if JD_ANALOG
} else if (m == JD_GPIO_MODE_ANALOG_IN) {
int v = adc_read_pin(p->gpio);
return devs_value_from_double(v / 65536.0);
#endif
} else {
return devs_undefined;
}
#endif
}
#if !JD_HOSTED
static inline int pull_from_mode(int mode) {
switch (mode & 0xf0) {
case JD_GPIO_MODE_OFF_PULL_UP:
return PIN_PULL_UP;
case JD_GPIO_MODE_OFF_PULL_DOWN:
return PIN_PULL_DOWN;
default:
return PIN_PULL_NONE;
}
}
#endif
void meth1_GPIO_setMode(devs_ctx_t *ctx) {
devs_pin_state_t *p = get_pin(ctx, devs_arg_self(ctx));
if (!p)
return;
int m = devs_arg_int_defl(ctx, 0, -1);
int gpio = p->gpio;
(void)gpio;
switch (m) {
#if !JD_HOSTED
case JD_GPIO_MODE_OFF:
case JD_GPIO_MODE_OFF_PULL_DOWN:
case JD_GPIO_MODE_OFF_PULL_UP:
pin_setup_analog_input(gpio);
pin_set_pull(gpio, pull_from_mode(m));
break;
case JD_GPIO_MODE_INPUT:
case JD_GPIO_MODE_INPUT_PULL_DOWN:
case JD_GPIO_MODE_INPUT_PULL_UP:
pin_setup_input(gpio, pull_from_mode(m));
break;
case JD_GPIO_MODE_OUTPUT:
case JD_GPIO_MODE_OUTPUT_HIGH:
case JD_GPIO_MODE_OUTPUT_LOW:
pin_set(gpio, pull_from_mode(m) == PIN_PULL_UP);
pin_setup_output(gpio);
break;
#endif
#if JD_ANALOG
case JD_GPIO_MODE_ANALOG_IN:
if (!adc_can_read_pin(gpio)) {
devs_throw_expecting_error_ext(ctx, "analog pin", devs_arg_self(ctx));
return;
}
pin_setup_analog_input(gpio);
break;
#endif
default:
devs_throw_expecting_error(ctx, DEVS_BUILTIN_STRING_MODE, devs_arg(ctx, 0));
return;
}
p->mode = m;
}
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