--- /dev/null
+/*
+ * Copyright © 2023 Bdale Garbee <bdale@gag.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; 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
+ * 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>
+
+/*
+ * define the FET outputs
+ */
+
+typedef struct
+{
+ struct stm_gpio * port;
+ int pin;
+} fet;
+
+fet outputs[] = {
+ {&stm_gpioe, 9}, /* step_0 */
+ {&stm_gpioe, 13}, /* step_1 */
+ {&stm_gpiob, 11}, /* step_2 */
+ {&stm_gpioe, 8}, /* step_3 */
+ {&stm_gpioe, 12}, /* step_4 */
+ {&stm_gpioe, 10}, /* step_5 */
+ {&stm_gpioe, 14}, /* step_6 */
+ {&stm_gpiob, 10}, /* step_7 */
+ {&stm_gpioe, 11}, /* step_8 */
+ {&stm_gpioe, 15}, /* step_9 */
+ {&stm_gpioa, 5}, /* step_10 */
+ {&stm_gpioc, 5}, /* step_11 */
+ {&stm_gpioe, 7}, /* step_12 */
+ {&stm_gpioa, 6}, /* step_13 */
+ {&stm_gpiob, 0}, /* step_14 */
+ {&stm_gpioa, 3}, /* step_15 */
+ {&stm_gpioa, 7}, /* step_16 */
+ {&stm_gpiob, 1}, /* step_17 */
+ {&stm_gpioa, 4}, /* step_18 */
+ {&stm_gpioc, 4}, /* step_19 */
+ {&stm_gpioe, 4}, /* step_20 */
+ {&stm_gpioc, 0}, /* step_21 */
+ {&stm_gpioc, 3}, /* step_22 */
+ {&stm_gpioe, 5}, /* step_23 */
+ {&stm_gpioc, 1}, /* step_24 */
+ {&stm_gpioe, 2}, /* step_25 */
+ {&stm_gpioc, 14}, /* step_26 */
+ {&stm_gpioc, 2}, /* step_27 */
+ {&stm_gpioe, 3}, /* step_28 */
+ {&stm_gpioc, 15}, /* step_29 */
+ {&stm_gpiob, 3}, /* step_30 */
+ {&stm_gpiob, 5}, /* step_31 */
+ {&stm_gpiob, 9}, /* step_32 */
+ {&stm_gpiob, 4}, /* step_33 */
+ {&stm_gpiob, 6}, /* step_34 */
+ {&stm_gpiod, 7}, /* step_35 */
+ {&stm_gpiob, 7}, /* step_36 */
+ {&stm_gpioe, 0}, /* step_37 */
+ {&stm_gpiod, 6}, /* step_38 */
+ {&stm_gpiob, 8}, /* step_39 */
+ {&stm_gpioc, 7}, /* step_40 */
+ {&stm_gpiod, 1}, /* step_41 */
+ {&stm_gpiod, 4}, /* step_42 */
+ {&stm_gpioc, 6}, /* step_43 */
+ {&stm_gpiod, 0}, /* step_44 */
+ {&stm_gpioc, 8}, /* step_45 */
+ {&stm_gpiod, 2}, /* step_46 */
+ {&stm_gpiod, 5}, /* step_47 */
+ {&stm_gpioc, 9}, /* step_48 */
+ {&stm_gpiod, 3}}; /* step_49 */
+
+static void
+ao_fet_control(uint32_t output, uint8_t value)
+{
+ /* map output 1-50 to corresponding GPIO port and pin, set to value */
+ ao_gpio_set(outputs[output - 1].port, outputs[output - 1].pin, value);
+}
+
+static void
+ao_fet_init(void)
+{
+ int i;
+
+ /* initialize GPIO outputs and turn them all off */
+ for (i = 0; i < 50; i++)
+ {
+ ao_enable_output(outputs[i].port, outputs[i].pin, 0);
+ }
+}
+
+static void
+ao_fet_on(void)
+{
+ uint32_t output;
+
+ output = ao_cmd_decimal();
+ if (ao_cmd_status != ao_cmd_success)
+ return;
+ if ((output < 1) || (output > 50))
+ printf ("Invalid FET selection %lu, must be 1..50\n", output);
+ else {
+ ao_fet_control(output, 1);
+ ao_led_on(AO_LED_RED);
+ }
+}
+
+static void
+ao_fet_off(void)
+{
+ uint32_t output;
+
+ output = ao_cmd_decimal();
+ if (ao_cmd_status != ao_cmd_success)
+ return;
+ if ((output < 1) || (output > 50))
+ printf ("Invalid FET selection %lu, must be 1..50\n", output);
+ else {
+ ao_fet_control(output, 0);
+ ao_led_off(AO_LED_RED);
+ }
+}
+
+static const struct ao_cmds ao_fet_cmds[] = {
+ { ao_fet_on, "S <output>\0Set (turn on) FET" },
+ { ao_fet_off, "R <output>\0Reset (turn off) FET" },
+ { 0, NULL }
+};
+
+int
+main(void)
+{
+ ao_fet_init(); /* turn all outputs off ASAP */
+ ao_clock_init();
+
+ ao_task_init();
+ ao_led_init();
+
+ /* both LEDs on briefly as system test */
+ ao_led_on(LEDS_AVAILABLE);
+
+ ao_serial_init();
+ ao_timer_init();
+ ao_dma_init();
+ ao_adc_init();
+ ao_cmd_init();
+ ao_usb_init();
+
+ ao_cmd_register(ao_fet_cmds);
+
+ /* turn red off, leave green on as a "power indicator" */
+ ao_led_off(AO_LED_RED);
+
+ ao_start_scheduler();
+}