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sdr-test: make sure to automatically start SSC+DMA when USB ISO EP opens 

this automatically starts to send samples at the time the usb audio
source on the host PC is opened.
This commit is contained in:
Harald Welte 2012-02-29 00:31:17 +01:00
parent d7cc695022
commit 0297414977
1 changed files with 9 additions and 0 deletions
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9
firmware/sdr-test-project/main.c
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@ -52,6 +52,7 @@
#include <osdr_fpga.h>
#include <req_ctx.h>
#include <uart_cmd.h>
#include <fast_source.h>
#define SSC_MCK 49152000
@ -179,6 +180,7 @@ void USBDCallbacks_Suspended(void)
USBState = STATE_SUSPEND;
}
static struct cmd_state cmd_state;
static int cmd_tuner_init(struct cmd_state *cs, enum cmd_op op,
@ -369,6 +371,8 @@ int main(void)
osdr_fpga_reg_write(OSDR_FPGA_REG_ADC_TIMING, (1 << 8) | 255);
osdr_fpga_reg_write(OSDR_FPGA_REG_PWM1, (1 << 400) | 800);
ssc_init();
// Enter menu loop
while (1) {
@ -379,6 +383,11 @@ int main(void)
ssc_stats();
}
}
/* Try to (re-)start the SSC DMA if the IN ISO EP is open but the
* SSC DMA is not active */
if (fastsource_interfaces[2] == 1 && !ssc_active())
ssc_dma_start();
}
}