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Kill the carrier upon exit

master
Christophe Jacquet 2015-09-05 18:38:52 +00:00
rodzic 589e825b33
commit 6d8fe70793
1 zmienionych plików z 16 dodań i 7 usunięć
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23
src/pi_fm_rds.c
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@ -236,6 +236,15 @@ udelay(int us)
static void
terminate(int num)
{
// Stop outputting and generating the clock.
if (clk_reg && gpio_reg && mbox.virt_addr) {
// Set GPIO4 to be an output (instead of ALT FUNC 0, which is the clock).
gpio_reg[GPFSEL0] = (gpio_reg[GPFSEL0] & ~(7 << 12)) | (1 << 12);
// Disable the clock generator.
clk_reg[GPCLK_CNTL] = 0x5A;
}
if (dma_reg && mbox.virt_addr) {
dma_reg[DMA_CS] = BCM2708_DMA_RESET;
udelay(10);
@ -244,13 +253,13 @@ terminate(int num)
fm_mpx_close();
close_control_pipe();
if (mbox.virt_addr != NULL) {
unmapmem(mbox.virt_addr, NUM_PAGES * 4096);
mem_unlock(mbox.handle, mbox.mem_ref);
mem_free(mbox.handle, mbox.mem_ref);
}
if (mbox.virt_addr != NULL) {
unmapmem(mbox.virt_addr, NUM_PAGES * 4096);
mem_unlock(mbox.handle, mbox.mem_ref);
mem_free(mbox.handle, mbox.mem_ref);
}
printf("Terminating: cleanly deactivated the DMA engine.\n");
printf("Terminating: cleanly deactivated the DMA engine and killed the carrier.\n");
exit(num);
}
@ -335,7 +344,7 @@ int tx(uint32_t carrier_freq, char *audio_file, uint16_t pi, char *ps, char *rt,
printf("virt_addr = %p\n", mbox.virt_addr);
// GPIO4 needs to be ALT FUNC 0 to otuput the clock
// GPIO4 needs to be ALT FUNC 0 to output the clock
gpio_reg[GPFSEL0] = (gpio_reg[GPFSEL0] & ~(7 << 12)) | (4 << 12);
// Program GPCLK to use MASH setting 1, so fractional dividers work