2 * Copyright © 2012 Keith Packard <keithp@keithp.com>
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
9 * This program is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License for more details.
14 * You should have received a copy of the GNU General Public License along
15 * with this program; if not, write to the Free Software Foundation, Inc.,
16 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
21 #include <ao_ms5607.h>
23 #if HAS_MS5607 || HAS_MS5611
25 struct ao_ms5607_prom ao_ms5607_prom;
26 static uint8_t ms5607_configured;
28 #ifndef AO_MS5607_SPI_SPEED
29 #define AO_MS5607_SPI_SPEED AO_SPI_SPEED_FAST
33 ao_ms5607_start(void) {
34 ao_spi_get_bit(AO_MS5607_CS_PORT, AO_MS5607_CS_PIN, AO_MS5607_SPI_INDEX, AO_MS5607_SPI_SPEED);
38 ao_ms5607_stop(void) {
39 ao_spi_put_bit(AO_MS5607_CS_PORT, AO_MS5607_CS_PIN, AO_MS5607_SPI_INDEX);
43 ao_ms5607_reset(void) {
46 cmd = AO_MS5607_RESET;
48 ao_spi_send(&cmd, 1, AO_MS5607_SPI_INDEX);
49 ao_delay(AO_MS_TO_TICKS(10));
54 ao_ms5607_crc(uint8_t *prom)
56 uint8_t crc_byte = prom[15];
63 for (cnt = 0; cnt < 16; cnt++) {
65 for (n_bit = 8; n_bit > 0; n_bit--) {
67 n_rem = (n_rem << 1) ^ 0x3000;
72 n_rem = (n_rem >> 12) & 0xf;
78 ao_ms5607_prom_valid(uint8_t *prom)
84 /* Look for a value other than 0x0000 or 0xffff */
86 for (i = 0; i < 16; i++)
92 crc = ao_ms5607_crc(prom);
93 if (crc != (prom[15] & 0xf))
100 ao_ms5607_prom_read(struct ao_ms5607_prom *prom)
105 r = (uint16_t *) prom;
106 for (addr = 0; addr < 8; addr++) {
107 uint8_t cmd = AO_MS5607_PROM_READ(addr);
109 ao_spi_send(&cmd, 1, AO_MS5607_SPI_INDEX);
110 ao_spi_recv(r, 2, AO_MS5607_SPI_INDEX);
115 if (!ao_ms5607_prom_valid((uint8_t *) prom))
116 ao_panic(AO_PANIC_SELF_TEST_MS5607);
118 #if __BYTE_ORDER == __LITTLE_ENDIAN
120 r = (uint16_t *) prom;
121 for (addr = 0; addr < 8; addr++) {
122 uint8_t *t = (uint8_t *) r;
132 ao_ms5607_setup(void)
134 if (ms5607_configured)
136 ms5607_configured = 1;
138 ao_ms5607_prom_read(&ao_ms5607_prom);
141 static volatile uint8_t ao_ms5607_done;
146 ao_exti_disable(AO_MS5607_MISO_PORT, AO_MS5607_MISO_PIN);
148 ao_wakeup((void *) &ao_ms5607_done);
152 ao_ms5607_get_sample(uint8_t cmd) {
159 ao_spi_send(&cmd, 1, AO_MS5607_SPI_INDEX);
161 ao_exti_enable(AO_MS5607_MISO_PORT, AO_MS5607_MISO_PIN);
163 #if AO_MS5607_PRIVATE_PINS
164 ao_spi_put(AO_MS5607_SPI_INDEX);
166 ao_arch_block_interrupts();
167 while (!ao_gpio_get(AO_MS5607_MISO_PORT, AO_MS5607_MISO_PIN) &&
169 ao_sleep((void *) &ao_ms5607_done);
170 ao_arch_release_interrupts();
171 #if AO_MS5607_PRIVATE_PINS
172 stm_gpio_set(AO_MS5607_CS_PORT, AO_MS5607_CS_PIN, 1);
178 read = AO_MS5607_ADC_READ;
179 ao_spi_send(&read, 1, AO_MS5607_SPI_INDEX);
180 ao_spi_recv(&reply, 3, AO_MS5607_SPI_INDEX);
183 return ((uint32_t) reply[0] << 16) | ((uint32_t) reply[1] << 8) | (uint32_t) reply[2];
186 #ifndef AO_MS5607_BARO_OVERSAMPLE
187 #define AO_MS5607_BARO_OVERSAMPLE 2048
190 #ifndef AO_MS5607_TEMP_OVERSAMPLE
191 #define AO_MS5607_TEMP_OVERSAMPLE AO_MS5607_BARO_OVERSAMPLE
194 #define token_paster(x,y) x ## y
195 #define token_evaluator(x,y) token_paster(x,y)
197 #define AO_CONVERT_D1 token_evaluator(AO_MS5607_CONVERT_D1_, AO_MS5607_BARO_OVERSAMPLE)
198 #define AO_CONVERT_D2 token_evaluator(AO_MS5607_CONVERT_D2_, AO_MS5607_TEMP_OVERSAMPLE)
201 ao_ms5607_sample(struct ao_ms5607_sample *sample)
203 sample->pres = ao_ms5607_get_sample(AO_CONVERT_D1);
204 sample->temp = ao_ms5607_get_sample(AO_CONVERT_D2);
208 #include "ao_ms5607_convert_8051.c"
210 #include "ao_ms5607_convert.c"
213 #ifndef HAS_MS5607_TASK
214 #define HAS_MS5607_TASK HAS_TASK
217 struct ao_ms5607_sample ao_ms5607_current;
223 struct ao_ms5607_sample sample;
227 ao_ms5607_sample(&sample);
228 ao_arch_block_interrupts();
229 ao_ms5607_current = sample;
230 AO_DATA_PRESENT(AO_DATA_MS5607);
232 ao_arch_release_interrupts();
236 struct ao_task ao_ms5607_task;
243 printf ("ms5607 reserved: %u\n", ao_ms5607_prom.reserved);
244 printf ("ms5607 sens: %u\n", ao_ms5607_prom.sens);
245 printf ("ms5607 off: %u\n", ao_ms5607_prom.off);
246 printf ("ms5607 tcs: %u\n", ao_ms5607_prom.tcs);
247 printf ("ms5607 tco: %u\n", ao_ms5607_prom.tco);
248 printf ("ms5607 tref: %u\n", ao_ms5607_prom.tref);
249 printf ("ms5607 tempsens: %u\n", ao_ms5607_prom.tempsens);
250 printf ("ms5607 crc: %u\n", ao_ms5607_prom.crc);
256 struct ao_ms5607_value value;
258 ao_ms5607_convert(&ao_ms5607_current, &value);
259 printf ("Pressure: %8lu %8ld\n", ao_ms5607_current.pres, value.pres);
260 printf ("Temperature: %8lu %8ld\n", ao_ms5607_current.temp, value.temp);
261 printf ("Altitude: %ld\n", ao_pa_to_altitude(value.pres));
264 const struct ao_cmds ao_ms5607_cmds[] = {
265 { ao_ms5607_dump, "B\0Display MS5607 data" },
268 #endif /* HAS_TASK */
273 ms5607_configured = 0;
274 ao_spi_init_cs(AO_MS5607_CS_PORT, (1 << AO_MS5607_CS_PIN));
277 ao_cmd_register(&ao_ms5607_cmds[0]);
280 ao_add_task(&ao_ms5607_task, ao_ms5607, "ms5607");
283 /* Configure the MISO pin as an interrupt; when the
284 * conversion is complete, the MS5607 will raise this
287 ao_exti_setup(AO_MS5607_MISO_PORT,
290 AO_EXTI_PIN_NOCONFIGURE,