*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; version 2 of the License.
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
*/
#include <ao.h>
-#include "ao_ms5607.h"
+#include <ao_exti.h>
+#include <ao_ms5607.h>
-static struct ms5607_prom ms5607_prom;
-static uint8_t ms5607_configured;
+#if HAS_MS5607 || HAS_MS5611
+
+__xdata struct ao_ms5607_prom ao_ms5607_prom;
+static __xdata uint8_t ms5607_configured;
+
+#ifndef AO_MS5607_SPI_SPEED
+#define AO_MS5607_SPI_SPEED AO_SPI_SPEED_FAST
+#endif
static void
ao_ms5607_start(void) {
- ao_spi_get(AO_MS5607_SPI_INDEX);
- stm_gpio_set(&AO_MS5607_CS_GPIO, AO_MS5607_CS, 0);
+ ao_spi_get_bit(AO_MS5607_CS_PORT, AO_MS5607_CS_PIN, AO_MS5607_CS, AO_MS5607_SPI_INDEX, AO_MS5607_SPI_SPEED);
}
static void
ao_ms5607_stop(void) {
- stm_gpio_set(&AO_MS5607_CS_GPIO, AO_MS5607_CS, 1);
- ao_spi_put(AO_MS5607_SPI_INDEX);
+ ao_spi_put_bit(AO_MS5607_CS_PORT, AO_MS5607_CS_PIN, AO_MS5607_CS, AO_MS5607_SPI_INDEX);
}
static void
uint8_t crc_byte = prom[15];
uint8_t cnt;
uint16_t n_rem = 0;
- uint16_t crc_read;
uint8_t n_bit;
+ uint8_t *p = prom;
prom[15] = 0;
for (cnt = 0; cnt < 16; cnt++) {
- n_rem ^= prom[cnt];
+ n_rem ^= *p++;
for (n_bit = 8; n_bit > 0; n_bit--) {
if (n_rem & 0x8000)
n_rem = (n_rem << 1) ^ 0x3000;
return n_rem;
}
+static int
+ao_ms5607_prom_valid(uint8_t *prom)
+{
+ uint8_t crc;
+ int i;
+ uint8_t *p;
+
+ /* Look for a value other than 0x0000 or 0xffff */
+ p = prom;
+ for (i = 0; i < 16; i++)
+ if (*p++ + 1 > 1)
+ break;
+ if (i == 16)
+ return FALSE;
+
+ crc = ao_ms5607_crc(prom);
+ if (crc != (prom[15] & 0xf))
+ return FALSE;
+
+ return TRUE;
+}
+
static void
-ao_ms5607_prom_read(struct ms5607_prom *prom)
+ao_ms5607_prom_read(__xdata struct ao_ms5607_prom *prom)
{
uint8_t addr;
- uint8_t crc;
uint16_t *r;
- r = (uint16_t *) prom;
+ r = (__xdata uint16_t *) prom;
for (addr = 0; addr < 8; addr++) {
uint8_t cmd = AO_MS5607_PROM_READ(addr);
ao_ms5607_start();
ao_ms5607_stop();
r++;
}
- crc = ao_ms5607_crc((uint8_t *) prom);
- if (crc != (((uint8_t *) prom)[15] & 0xf))
- printf ("MS5607 PROM CRC error (computed %x actual %x)\n", crc, (((uint8_t *) prom)[15] & 0xf));
+
+ if (!ao_ms5607_prom_valid((uint8_t *) prom))
+ ao_panic(AO_PANIC_SELF_TEST_MS5607);
#if __BYTE_ORDER == __LITTLE_ENDIAN
/* Byte swap */
r = (uint16_t *) prom;
for (addr = 0; addr < 8; addr++) {
- uint16_t t = *r;
- *r++ = (t << 8) | (t >> 8);
+ uint8_t *t = (uint8_t *) r;
+ uint8_t a = t[0];
+ t[0] = t[1];
+ t[1] = a;
+ r++;
}
#endif
}
-static void
+void
ao_ms5607_setup(void)
{
if (ms5607_configured)
return;
ms5607_configured = 1;
ao_ms5607_reset();
- ao_ms5607_prom_read(&ms5607_prom);
+ ao_ms5607_prom_read(&ao_ms5607_prom);
+}
+
+static __xdata volatile uint8_t ao_ms5607_done;
+
+static void
+ao_ms5607_isr(void)
+{
+ ao_exti_disable(AO_MS5607_MISO_PORT, AO_MS5607_MISO_PIN);
+ ao_ms5607_done = 1;
+ ao_wakeup((__xdata void *) &ao_ms5607_done);
}
static uint32_t
-ao_ms5607_convert(uint8_t cmd) {
- uint8_t reply[3];
- uint8_t read;
+ao_ms5607_get_sample(uint8_t cmd) {
+ __xdata uint8_t reply[3];
+ __xdata uint8_t read;
+
+ ao_ms5607_done = 0;
ao_ms5607_start();
ao_spi_send(&cmd, 1, AO_MS5607_SPI_INDEX);
- ao_ms5607_stop();
- ao_delay(AO_MS_TO_TICKS(20));
+ ao_exti_enable(AO_MS5607_MISO_PORT, AO_MS5607_MISO_PIN);
+
+#if AO_MS5607_PRIVATE_PINS
+ ao_spi_put(AO_MS5607_SPI_INDEX);
+#endif
+ ao_arch_block_interrupts();
+ while (!ao_gpio_get(AO_MS5607_MISO_PORT, AO_MS5607_MISO_PIN, AO_MS5607_MISO) &&
+ !ao_ms5607_done)
+ ao_sleep((void *) &ao_ms5607_done);
+ ao_arch_release_interrupts();
+#if AO_MS5607_PRIVATE_PINS
+ stm_gpio_set(AO_MS5607_CS_PORT, AO_MS5607_CS_PIN, 1);
+#else
+ ao_ms5607_stop();
+#endif
ao_ms5607_start();
read = AO_MS5607_ADC_READ;
return ((uint32_t) reply[0] << 16) | ((uint32_t) reply[1] << 8) | (uint32_t) reply[2];
}
+#ifndef AO_MS5607_BARO_OVERSAMPLE
+#define AO_MS5607_BARO_OVERSAMPLE 2048
+#endif
+
+#ifndef AO_MS5607_TEMP_OVERSAMPLE
+#define AO_MS5607_TEMP_OVERSAMPLE AO_MS5607_BARO_OVERSAMPLE
+#endif
+
+#define token_paster(x,y) x ## y
+#define token_evaluator(x,y) token_paster(x,y)
+
+#define AO_CONVERT_D1 token_evaluator(AO_MS5607_CONVERT_D1_, AO_MS5607_BARO_OVERSAMPLE)
+#define AO_CONVERT_D2 token_evaluator(AO_MS5607_CONVERT_D2_, AO_MS5607_TEMP_OVERSAMPLE)
+
void
-ao_ms5607_sample(struct ao_ms5607_sample *sample)
+ao_ms5607_sample(__xdata struct ao_ms5607_sample *sample)
{
- uint8_t addr;
- uint32_t D1, D2;
- int32_t dT;
- int32_t TEMP;
- int64_t OFF;
- int64_t SENS;
- int32_t P;
+ sample->pres = ao_ms5607_get_sample(AO_CONVERT_D1);
+ sample->temp = ao_ms5607_get_sample(AO_CONVERT_D2);
+}
- ao_ms5607_setup();
+#ifdef _CC1111_H_
+#include "ao_ms5607_convert_8051.c"
+#else
+#include "ao_ms5607_convert.c"
+#endif
- D2 = ao_ms5607_convert(AO_MS5607_CONVERT_D2_4096);
- printf ("Conversion D2: %d\n", D2);
- D1 = ao_ms5607_convert(AO_MS5607_CONVERT_D1_4096);
- printf ("Conversion D1: %d\n", D1);
-
- dT = D2 - ((int32_t) ms5607_prom.tref << 8);
-
- TEMP = 2000 + (((int64_t) dT * ms5607_prom.tempsens) >> 23);
-
- OFF = ((int64_t) ms5607_prom.off << 17) + (((int64_t) ms5607_prom.tco * dT) >> 6);
-
- SENS = ((int64_t) ms5607_prom.sens << 16) + (((int64_t) ms5607_prom.tcs * dT) >> 7);
-
- if (TEMP < 2000) {
- int32_t T2 = ((int64_t) dT * (int64_t) dT) >> 31;
- int32_t TEMPM = TEMP - 2000;
- int64_t OFF2 = (61 * (int64_t) TEMPM * (int64_t) TEMPM) >> 4;
- int64_t SENS2 = 2 * (int64_t) TEMPM * (int64_t) TEMPM;
- if (TEMP < 1500) {
- int32_t TEMPP = TEMP + 1500;
- int64_t TEMPP2 = TEMPP * TEMPP;
- OFF2 = OFF2 + 15 * TEMPP2;
- SENS2 = SENS2 + 8 * TEMPP2;
- }
- TEMP -= T2;
- OFF -= OFF2;
- SENS -= SENS2;
+#ifndef HAS_MS5607_TASK
+#define HAS_MS5607_TASK HAS_TASK
+#endif
+
+__xdata struct ao_ms5607_sample ao_ms5607_current;
+
+#if HAS_MS5607_TASK
+static void
+ao_ms5607(void)
+{
+ struct ao_ms5607_sample sample;
+ ao_ms5607_setup();
+ for (;;)
+ {
+ ao_ms5607_sample(&sample);
+ ao_arch_block_interrupts();
+ ao_ms5607_current = sample;
+ AO_DATA_PRESENT(AO_DATA_MS5607);
+ AO_DATA_WAIT();
+ ao_arch_release_interrupts();
}
+}
- P = ((((int64_t) D1 * SENS) >> 21) - OFF) >> 15;
- sample->temp = TEMP;
- sample->pres = P;
+__xdata struct ao_task ao_ms5607_task;
+#endif
+
+#if HAS_TASK
+void
+ao_ms5607_info(void)
+{
+ printf ("ms5607 reserved: %u\n", ao_ms5607_prom.reserved);
+ printf ("ms5607 sens: %u\n", ao_ms5607_prom.sens);
+ printf ("ms5607 off: %u\n", ao_ms5607_prom.off);
+ printf ("ms5607 tcs: %u\n", ao_ms5607_prom.tcs);
+ printf ("ms5607 tco: %u\n", ao_ms5607_prom.tco);
+ printf ("ms5607 tref: %u\n", ao_ms5607_prom.tref);
+ printf ("ms5607 tempsens: %u\n", ao_ms5607_prom.tempsens);
+ printf ("ms5607 crc: %u\n", ao_ms5607_prom.crc);
}
static void
ao_ms5607_dump(void)
{
- struct ao_ms5607_sample sample;
+ __xdata struct ao_ms5607_value value;
- ao_ms5607_sample(&sample);
- printf ("Temperature: %d\n", sample.temp);
- printf ("Pressure %d\n", sample.pres);
+ ao_ms5607_convert(&ao_ms5607_current, &value);
+ printf ("Pressure: %8lu %8ld\n", ao_ms5607_current.pres, value.pres);
+ printf ("Temperature: %8lu %8ld\n", ao_ms5607_current.temp, value.temp);
+ printf ("Altitude: %ld\n", ao_pa_to_altitude(value.pres));
}
__code struct ao_cmds ao_ms5607_cmds[] = {
- { ao_ms5607_dump, "p\0Display MS5607 data" },
+ { ao_ms5607_dump, "B\0Display MS5607 data" },
{ 0, NULL },
};
+#endif /* HAS_TASK */
void
ao_ms5607_init(void)
{
ms5607_configured = 0;
+ ao_spi_init_cs(AO_MS5607_CS_PORT, (1 << AO_MS5607_CS_PIN));
+
+#if HAS_TASK
ao_cmd_register(&ao_ms5607_cmds[0]);
- ao_spi_init_cs(AO_MS5607_CS_GPIO, (1 << AO_MS5607_CS));
+#endif
+#if HAS_MS5607_TASK
+ ao_add_task(&ao_ms5607_task, ao_ms5607, "ms5607");
+#endif
+
+ /* Configure the MISO pin as an interrupt; when the
+ * conversion is complete, the MS5607 will raise this
+ * pin as a signal
+ */
+ ao_exti_setup(AO_MS5607_MISO_PORT,
+ AO_MS5607_MISO_PIN,
+ AO_EXTI_MODE_RISING|
+ AO_EXTI_PIN_NOCONFIGURE,
+ ao_ms5607_isr);
}
+
+#endif
projects / fw / altos / blobdiff