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Deal with MSB-outputing DMA engine
[fw/altos]
/
target
/
adc-serial
/
adc_serial.c
diff --git
a/target/adc-serial/adc_serial.c
b/target/adc-serial/adc_serial.c
index fb58b4c28c59d37a98c3d03894e8e074cf01d20e..9f722bb5d80a3c8627a6b303efdc6233ed4934c6 100644
(file)
--- a/
target/adc-serial/adc_serial.c
+++ b/
target/adc-serial/adc_serial.c
@@
-405,7
+405,15
@@
struct cc_dma_channel __xdata dma_config;
#define ADC_LEN 6
#define ADC_LEN 6
-uint8_t __xdata adc_output[ADC_LEN*2];
+/* The DMA engine writes to XDATA in MSB order */
+struct dma_xdata16 {
+ uint8_t high;
+ uint8_t low;
+};
+
+struct dma_xdata16 adc_output[ADC_LEN];
+
+#define DMA_XDATA16(a,n) ((uint16_t) ((a)[n].high << 8) | (uint16_t) (a[n].low))
#define ADDRH(a) (((uint16_t) (a)) >> 8)
#define ADDRL(a) (((uint16_t) (a)))
#define ADDRH(a) (((uint16_t) (a)) >> 8)
#define ADDRL(a) (((uint16_t) (a)))
@@
-518,14
+526,16
@@
usart_out_string(uint8_t *string)
usart_out_byte(b);
}
usart_out_byte(b);
}
-uint8_t __xdata num_buffer[10];
+#define NUM_LEN 6
+
+uint8_t __xdata num_buffer[NUM_LEN];
uint8_t __xdata * __xdata num_ptr;
void
usart_out_number(uint16_t v)
{
uint8_t __xdata * __xdata num_ptr;
void
usart_out_number(uint16_t v)
{
- num_ptr = num_buffer +
10
;
+ num_ptr = num_buffer +
NUM_LEN
;
*--num_ptr = '\0';
do {
*--num_ptr = '0' + v % 10;
*--num_ptr = '\0';
do {
*--num_ptr = '0' + v % 10;
@@
-533,10
+543,10
@@
usart_out_number(uint16_t v)
} while (v);
while (num_ptr != num_buffer)
*--num_ptr = ' ';
} while (v);
while (num_ptr != num_buffer)
*--num_ptr = ' ';
- usart_out_string(num_
pt
r);
+ usart_out_string(num_
buffe
r);
}
}
-#define ADC(n)
(((uint16_t) (adc_output[n<<1] << 8)) | (uint16_t) (adc_output[(n<<1)+1])
)
+#define ADC(n)
DMA_XDATA16(adc_output,n
)
main ()
{
main ()
{
@@
-551,15
+561,15
@@
main ()
adc_run();
usart_out_string("accel: ");
usart_out_number(ADC(0));
adc_run();
usart_out_string("accel: ");
usart_out_number(ADC(0));
- usart_out_string("pres: ");
+ usart_out_string("
pres: ");
usart_out_number(ADC(1));
usart_out_number(ADC(1));
- usart_out_string("temp: ");
+ usart_out_string("
temp: ");
usart_out_number(ADC(2));
usart_out_number(ADC(2));
- usart_out_string("batt: ");
+ usart_out_string("
batt: ");
usart_out_number(ADC(3));
usart_out_number(ADC(3));
- usart_out_string("drogue: ");
+ usart_out_string("
drogue: ");
usart_out_number(ADC(4));
usart_out_number(ADC(4));
- usart_out_string("main: ");
+ usart_out_string("
main: ");
usart_out_number(ADC(5));
usart_out_string("\r\n");
delay(10);
usart_out_number(ADC(5));
usart_out_string("\r\n");
delay(10);