M:Robe 500: Fix FIQ's and make the audio DMA a FIQ, simplify the ADC code and make it more reliable. Fix ADC problems on initial boot.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@23948 a1c6a512-1295-4272-9138-f99709370657

1 files changed, 6 insertions, 23 deletions

diff --git a/firmware/target/arm/tms320dm320/mrobe-500/adc-mr500.c b/firmware/target/arm/tms320dm320/mrobe-500/adc-mr500.c
index 5df764620d..2acce7a695 100644
--- a/firmware/target/arm/tms320dm320/mrobe-500/adc-mr500.c
+++ b/firmware/target/arm/tms320dm320/mrobe-500/adc-mr500.c
@@ -42,6 +42,9 @@ void adc_init(void)
     
     /* Enable the tsc2100 interrupt */
     IO_INTC_EINT2 |= (1<<3); /* IRQ_GIO14 */
+    
+    /* Read all registers to make sure they are clear */
+    tsc2100_read_data();
 }
 
 /* Touchscreen data available interupt */
@@ -49,31 +52,11 @@ void GIO14(void)
 {
     /* Interrupts work properly when cleared first */
     IO_INTC_IRQ2 = (1<<3); /* IRQ_GIO14 == 35 */
-    
-    short tsadc = tsc2100_readreg(TSADC_PAGE, TSADC_ADDRESS);
-    short adscm = (tsadc&TSADC_ADSCM_MASK)>>TSADC_ADSCM_SHIFT;
-    
+
     /* Always read all registers in one go to clear any missed flags */
     tsc2100_read_data();
     
-    switch (adscm)
-    {
-        case 0x01:
-        case 0x02:
-        case 0x03:
-        case 0x04:
-        case 0x05:
-            /* do a battery read - this will shutdown the adc till the next tick
-             */
-//            tsc2100_set_mode(true, 0x0B); 
-            break;
-        case 0x06:
-        case 0x07:
-        case 0x08:
-        case 0x09:
-        case 0x0B:
-            tsc2100_set_mode(true, 0x01);
-            break;
-    }    
+    /* Stop the scan, firmware will initiate another scan with a mode set */
+    tsc2100_set_mode(true, 0x00);  
 }