Merge pull request #314 from pennam/portenta_pdm_restart_fix

facchinm · web-flow · commit a1ebc12682c7 · 2021-09-13T11:29:45.000+02:00
Fix PDM restart issue on portenta H7
diff --git a/libraries/PDM/src/stm32/audio.c b/libraries/PDM/src/stm32/audio.c
@@ -194,6 +194,7 @@ int py_audio_init(size_t channels, uint32_t frequency, int gain_db, float highpa
         return 0;
     } else {
         g_o_channels = channels;
+        g_i_channels = AUDIO_SAI_NBR_CHANNELS;
     }
 
     uint32_t decimation_factor = 64; // Fixed decimation factor
@@ -344,8 +345,8 @@ void py_audio_deinit()
         hdma_sai_rx.Instance = NULL;
     }
 
-    g_i_channels = 0;
-    g_o_channels = 0;
+    g_i_channels = AUDIO_SAI_NBR_CHANNELS;
+    g_o_channels = AUDIO_SAI_NBR_CHANNELS;
     //free(g_pcmbuf);
     g_pcmbuf = NULL;
 }

Original file line number	Diff line number	Diff line change
`@@ -194,6 +194,7 @@ int py_audio_init(size_t channels, uint32_t frequency, int gain_db, float highpa`
`194`	`194`	`return 0;`
`195`	`195`	`} else {`
`196`	`196`	`g_o_channels = channels;`
	`197`	`+ g_i_channels = AUDIO_SAI_NBR_CHANNELS;`
`197`	`198`	`}`
`198`	`199`
`199`	`200`	`uint32_t decimation_factor = 64; // Fixed decimation factor`
`@@ -344,8 +345,8 @@ void py_audio_deinit()`
`344`	`345`	`hdma_sai_rx.Instance = NULL;`
`345`	`346`	`}`
`346`	`347`
`347`		`- g_i_channels = 0;`
`348`		`- g_o_channels = 0;`
	`348`	`+ g_i_channels = AUDIO_SAI_NBR_CHANNELS;`
	`349`	`+ g_o_channels = AUDIO_SAI_NBR_CHANNELS;`
`349`	`350`	`//free(g_pcmbuf);`
`350`	`351`	`g_pcmbuf = NULL;`
`351`	`352`	`}`