/**
* @file pin_test.c
- * @purpose Implementations to allow direct control over pins through FastCGI
+ * @brief Implementations to allow direct control over pins through FastCGI
*/
#include "pin_test.h"
*/
void Pin_Init()
{
- for (int i = 0; i < GPIO_NUM_PINS; ++i)
- GPIO_Export(g_index_to_gpio[i]);
-
- for (int i = 0; i < ADC_NUM_PINS; ++i)
- ADC_Export();
-
- for (int i = 0; i < PWM_NUM_PINS; ++i)
- PWM_Export(i);
+
}
/**
void Pin_Close()
{
for (int i = 0; i < GPIO_NUM_PINS; ++i)
- GPIO_Unexport(g_index_to_gpio[i]);
+ GPIO_Unexport(g_pin_index_to_gpio[i]);
for (int i = 0; i < ADC_NUM_PINS; ++i)
ADC_Unexport(i);
PWM_Unexport(i);
}
+/**
+ * Configures a pin (Export/Unexport business)
+ * @param type The pin type (GPIO/PWM/ADC)
+ * @param pin_export Whether to export/unexport/leave-as-is the pin
+ * @param num The pin number
+ */
+bool Pin_Configure(const char *type, int pin_export, int num)
+{
+ bool ret = true;
+
+ if (strcmp(type, "gpo") == 0 || strcmp(type, "gpi") == 0)
+ {
+ //Don't allow unexport of gpio
+ if (pin_export > 0)
+ ret = GPIO_Export(num);
+ }
+ else if (strcmp(type, "pwm") == 0)
+ {
+ if (pin_export < 0)
+ PWM_Unexport(num);
+ else
+ ret = PWM_Export(num);
+ }
+ else if (strcmp(type, "adc") == 0)
+ {
+ //Don't allow unexport of adc
+ if (pin_export > 0)
+ ret = ADC_Export(num);
+ }
+ return ret;
+}
+
/**
* Handle a request to the Pin test module
* @param context - The FastCGI context
void Pin_Handler(FCGIContext *context, char * params)
{
- char * type = NULL;
+ const char * type = NULL;
int num = 0;
- bool set = true;
+ int pin_export = 0;
+ bool set = false;
bool pol = false;
double freq = 50;
double duty = 0.5;
FCGIValue values[] = {
{"type", &type, FCGI_REQUIRED(FCGI_STRING_T)},
{"num", &num, FCGI_REQUIRED(FCGI_INT_T)},
+ {"export", &pin_export, FCGI_INT_T},
{"set", &set, FCGI_BOOL_T},
{"pol", &pol, FCGI_BOOL_T},
{"freq", &freq, FCGI_DOUBLE_T},
typedef enum {
TYPE,
NUM,
+ EXPORT,
SET,
POL,
FREQ,
return;
}
- Log(LOGDEBUG, "Params: type = %s, num = %d, set = %d, pol = %d, freq = %f, duty = %f", type, num, set, pol, freq, duty);
+ Log(LOGDEBUG, "Params: type = %s, num = %d, export = %d, set = %d, pol = %d, freq = %f, duty = %f", type, num, pin_export, set, pol, freq, duty);
+ if (pin_export != 0)
+ {
+ if (!Pin_Configure(type, pin_export, num))
+ {
+ FCGI_RejectJSON(context, "Failed to (un)export the pin. Check that a valid number has been specified.");
+ return;
+ }
+ FCGI_BeginJSON(context, STATUS_OK);
+ FCGI_JSONPair("description", "Pin (un)export OK!");
+ FCGI_EndJSON();
+ return;
+ }
if (strcmp(type, "gpo") == 0)
{
- if (num <= 0 || num > GPIO_NUM_PINS)
+ if (num <= 0 || num > GPIO_MAX_NUMBER)
{
FCGI_RejectJSON(context, "Invalid GPIO pin");
return;
}
Log(LOGDEBUG, "Setting GPIO%d to %d", num, set);
- GPIO_Set(num, set);
-
- FCGI_PrintRaw("Content-type: text/plain\r\n\r\n");
- FCGI_PrintRaw("GPIO%d set to %d\n", num, set);
+ if (!GPIO_Set(num, set))
+ {
+ FCGI_RejectJSON(context, "Failed to set the GPIO pin. Check that it's exported.");
+ }
+ else
+ {
+ FCGI_PrintRaw("Content-type: text/plain\r\n\r\n");
+ FCGI_PrintRaw("GPIO%d set to %d\n", num, set);
+ }
}
else if (strcmp(type, "gpi") == 0)
{
- if (num < 0 || num >= GPIO_NUM_PINS)
+ if (num < 0 || num > GPIO_MAX_NUMBER)
{
FCGI_RejectJSON(context, "Invalid GPIO pin");
return;
}
Log(LOGDEBUG, "Reading GPIO%d", num);
- FCGI_PrintRaw("Content-type: text/plain\r\n\r\n");
- FCGI_PrintRaw("GPIO%d reads %d\n", num, GPIO_Read(num));
-
+ bool val;
+ if (!GPIO_Read(num, &val))
+ {
+ FCGI_RejectJSON(context, "Failed to read from the GPIO pin. Check that it's exported.");
+ }
+ else
+ {
+ FCGI_PrintRaw("Content-type: text/plain\r\n\r\n");
+ FCGI_PrintRaw("GPIO%d reads %d\n", num, val);
+ }
}
else if (strcmp(type, "adc") == 0)
{
return;
}
Log(LOGDEBUG, "Reading ADC%d", num, set);
- FCGI_PrintRaw("Content-type: text/plain\r\n\r\n");
- FCGI_PrintRaw("ADC%d reads %d\n", num, ADC_Read(num));
+ int raw_adc;
+ if (!ADC_Read(num, &raw_adc))
+ {
+ FCGI_RejectJSON(context, "ADC read failed. Check that it's exported.");
+ }
+ else
+ {
+ FCGI_PrintRaw("Content-type: text/plain\r\n\r\n");
+ FCGI_PrintRaw("%d\n", raw_adc);
+ }
}
else if (strcmp(type, "pwm") == 0)
{
FCGI_RejectJSON(context, "Invalid PWM pin");
return;
}
-
- FCGI_PrintRaw("Content-type: text/plain\r\n\r\n");
if (set)
{
duty = duty < 0 ? 0 : duty > 1 ? 1 : duty;
long period_ns = (long)(1e9 / freq);
long duty_ns = (long)(duty * period_ns);
- PWM_Set(num, pol, period_ns, duty_ns);
- FCGI_PrintRaw("PWM%d set to period_ns = %lu (%f Hz), duty_ns = %lu (%f), polarity = %d",
- num, period_ns, freq, duty_ns, duty*100, (int)pol);
+ if (!PWM_Set(num, pol, period_ns, duty_ns))
+ {
+ FCGI_RejectJSON(context, "PWM set failed. Check if it's exported, and that there's no channel conflict.");
+ }
+ else
+ {
+ FCGI_PrintRaw("Content-type: text/plain\r\n\r\n");
+ FCGI_PrintRaw("PWM%d set to period_ns = %lu (%f Hz), duty_ns = %lu (%f), polarity = %d",
+ num, period_ns, freq, duty_ns, duty*100, (int)pol);
+ }
}
else
{
Log(LOGDEBUG, "Stopping PWM%d",num);
PWM_Stop(num);
+ FCGI_PrintRaw("Content-type: text/plain\r\n\r\n");
FCGI_PrintRaw("PWM%d stopped",num);
}
}
FCGI_RejectJSON(context, "Invalid pin type");
}
-
-
}
-
-//EOF
git.ucc.asn.au / matches / MCTX3420.git / blobdiff
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