--- /dev/null
+/*
+ * Copyright © 2012 Keith Packard <keithp@keithp.com>
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ */
+
+#include <ao.h>
+#include <ao_data.h>
+
+#ifndef AO_ADC_0
+#define AO_ADC_0 0
+#endif
+
+#ifndef AO_ADC_1
+#define AO_ADC_1 0
+#endif
+
+#ifndef AO_ADC_2
+#define AO_ADC_2 0
+#endif
+
+#ifndef AO_ADC_3
+#define AO_ADC_3 0
+#endif
+
+#ifndef AO_ADC_4
+#define AO_ADC_4 0
+#endif
+
+#ifndef AO_ADC_5
+#define AO_ADC_5 0
+#endif
+
+#ifndef AO_ADC_6
+#define AO_ADC_6 0
+#endif
+
+#ifndef AO_ADC_7
+#define AO_ADC_7 0
+#endif
+
+#if AO_ADC_7
+# define AO_ADC_LAST 7
+#else
+# if AO_ADC_6
+# define AO_ADC_LAST 6
+# else
+# if AO_ADC_5
+# define AO_ADC_LAST 5
+# else
+# if AO_ADC_4
+# define AO_ADC_LAST 4
+# else
+# if AO_ADC_3
+# define AO_ADC_LAST 3
+# else
+# if AO_ADC_2
+# define AO_ADC_LAST 2
+# else
+# if AO_ADC_1
+# define AO_ADC_LAST 1
+# else
+# if AO_ADC_0
+# define AO_ADC_LAST 0
+# endif
+# endif
+# endif
+# endif
+# endif
+# endif
+# endif
+#endif
+
+static uint8_t ao_adc_ready;
+
+void lpc_adc_isr(void)
+{
+ uint16_t *out = (uint16_t *) &ao_data_ring[ao_data_head].adc;
+ vuint32_t *in = &lpc_adc.dr[0];
+
+ /* Store converted values in packet */
+
+#if AO_ADC_0
+ *out++ = ((uint16_t) *in++) >> 1;
+#endif
+#if AO_ADC_1
+ *out++ = ((uint16_t) *in++) >> 1;
+#endif
+#if AO_ADC_2
+ *out++ = ((uint16_t) *in++) >> 1;
+#endif
+#if AO_ADC_3
+ *out++ = ((uint16_t) *in++) >> 1;
+#endif
+#if AO_ADC_4
+ *out++ = ((uint16_t) *in++) >> 1;
+#endif
+#if AO_ADC_5
+ *out++ = ((uint16_t) *in++) >> 1;
+#endif
+#if AO_ADC_6
+ *out++ = ((uint16_t) *in++) >> 1;
+#endif
+#if AO_ADC_7
+ *out++ = ((uint16_t) *in++) >> 1;
+#endif
+
+ AO_DATA_PRESENT(AO_DATA_ADC);
+ if (ao_data_present == AO_DATA_ALL) {
+#if HAS_MS5607
+ ao_data_ring[ao_data_head].ms5607_raw = ao_ms5607_current;
+#endif
+#if HAS_MMA655X
+ ao_data_ring[ao_data_head].mma655x = ao_mma655x_current;
+#endif
+#if HAS_HMC5883
+ ao_data_ring[ao_data_head].hmc5883 = ao_hmc5883_current;
+#endif
+#if HAS_MPU6000
+ ao_data_ring[ao_data_head].mpu6000 = ao_mpu6000_current;
+#endif
+ ao_data_ring[ao_data_head].tick = ao_tick_count;
+ ao_data_head = ao_data_ring_next(ao_data_head);
+ ao_wakeup((void *) &ao_data_head);
+ }
+ ao_adc_ready = 1;
+}
+
+#define AO_ADC_MASK ((AO_ADC_0 << 0) | \
+ (AO_ADC_1 << 1) | \
+ (AO_ADC_2 << 2) | \
+ (AO_ADC_3 << 3) | \
+ (AO_ADC_4 << 4) | \
+ (AO_ADC_5 << 5) | \
+ (AO_ADC_6 << 6) | \
+ (AO_ADC_7 << 7))
+
+#define AO_ADC_CLKDIV (AO_LPC_CLKOUT / 4500000)
+
+/*
+ * Start the ADC sequence using the DMA engine
+ */
+void
+ao_adc_poll(void)
+{
+ if (!ao_adc_ready)
+ return;
+ ao_adc_ready = 0;
+
+ lpc_adc.cr = ((AO_ADC_MASK << LPC_ADC_CR_SEL) |
+ (AO_ADC_CLKDIV << LPC_ADC_CR_CLKDIV) |
+ (1 << LPC_ADC_CR_BURST) |
+ (LPC_ADC_CR_CLKS_11 << LPC_ADC_CR_CLKS));
+}
+
+static void
+ao_adc_dump(void) __reentrant
+{
+ struct ao_data packet;
+ int16_t *d;
+ uint8_t i;
+
+ ao_data_get(&packet);
+#ifdef AO_ADC_DUMP
+ AO_ADC_DUMP(&packet);
+#else
+ printf("tick: %5u", packet.tick);
+ d = (int16_t *) (&packet.adc);
+ for (i = 0; i < AO_NUM_ADC; i++)
+ printf (" %2d: %5d", i, d[i]);
+ printf("\n");
+#endif
+}
+
+__code struct ao_cmds ao_adc_cmds[] = {
+ { ao_adc_dump, "a\0Display current ADC values" },
+ { 0, NULL },
+};
+
+void
+ao_adc_init(void)
+{
+ lpc_scb.sysahbclkctrl |= (1 << LPC_SCB_SYSAHBCLKCTRL_ADC);
+ lpc_scb.pdruncfg &= ~(1 << LPC_SCB_PDRUNCFG_ADC_PD);
+
+ /* Enable interrupt when last channel is complete */
+ lpc_adc.inten = (1 << AO_ADC_LAST);
+
+ lpc_nvic_set_enable(LPC_ISR_ADC_POS);
+ lpc_nvic_set_priority(LPC_ISR_ADC_POS, AO_LPC_NVIC_CLOCK_PRIORITY);
+#if AO_ADC_0
+ ao_enable_analog(0, 11);
+#endif
+#if AO_ADC_1
+ ao_enable_analog(0, 12);
+#endif
+#if AO_ADC_2
+ ao_enable_analog(0, 13);
+#endif
+#if AO_ADC_3
+ ao_enable_analog(0, 14);
+#endif
+#if AO_ADC_4
+ ao_enable_analog(0, 14);
+#endif
+#if AO_ADC_5
+ ao_enable_analog(0, 14);
+#endif
+#if AO_ADC_6
+ ao_enable_analog(0, 14);
+#endif
+#if AO_ADC_7
+ ao_enable_analog(0, 14);
+#endif
+ ao_cmd_register(&ao_adc_cmds[0]);
+
+ ao_adc_ready = 1;
+}
projects / fw / altos / blobdiff