0b90fd5adf
As both C and C++ standards require applications running under an OS to
return 'int', adapt that for Zephyr to align with those standard. This also
eliminates errors when building with clang when not using -ffreestanding,
and reduces the need for compiler flags to silence warnings for both clang
and gcc.
Most of these changes were automated using coccinelle with the following
script:
@@
@@
- void
+ int
main(...) {
...
- return;
+ return 0;
...
}
Approximately 40 files had to be edited by hand as coccinelle was unable to
fix them.
Signed-off-by: Keith Packard <keithp@keithp.com>
53 lines
1.2 KiB
C
53 lines
1.2 KiB
C
/*
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* Copyright (c) 2022 Espressif Systems (Shanghai) Co., Ltd.
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include <zephyr/kernel.h>
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#include <zephyr/sys/printk.h>
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#include <zephyr/drivers/ipm.h>
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#include <zephyr/device.h>
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#include <string.h>
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static const char fake_request[] = {"PRO_CPU: Fake request to APP_CPU"};
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static const struct device *ipm_dev;
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static char received_string[64];
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static struct k_sem sync;
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static void ipm_receive_callback(const struct device *ipmdev, void *user_data,
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uint32_t id, volatile void *data)
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{
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ARG_UNUSED(ipmdev);
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ARG_UNUSED(user_data);
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strcpy(received_string, (const char *)data);
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k_sem_give(&sync);
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}
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int main(void)
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{
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k_sem_init(&sync, 0, 1);
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ipm_dev = DEVICE_DT_GET(DT_NODELABEL(ipm0));
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if (!ipm_dev) {
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printk("Failed to get IPM device.\n\r");
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return 0;
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}
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ipm_register_callback(ipm_dev, ipm_receive_callback, NULL);
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while (1) {
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printk("PRO_CPU is sending a fake request, waiting remote response...\n\r");
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ipm_send(ipm_dev, -1, sizeof(fake_request), &fake_request, sizeof(fake_request));
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k_sem_take(&sync, K_FOREVER);
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printk("PRO_CPU received a message from APP_CPU : %s\n\r", received_string);
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k_sleep(K_MSEC(200));
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}
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return 0;
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}
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