How can I print a string to DMA? (TLSR 825x )
Dec 12, 2022 08:59
I want to send the output of "mini_printf" to DMA, not port simulation.
I modified it as below, but the string is not properly printed.
Using "uart_put_char(span);" outputs properly to port simulation.
However, it does not work properly to print this out to DMA.
Reference was made to the SDK source code.
How can I print a string to DMA?
The purpose of using DMA is to use UART communication with other modules by default as DMA, and I want to use it as a debug at the same time.
There are currently no normal ports left.
intmini_printf(constchar *format, ...){
charspan;
unsignedlongj;
char *s;
//char *msg;
va_list arg_ptr;
va_start(arg_ptr, format);
uart_data_ttrans_buff = {0, {0, } };
unsignedchari=0;
while((span = *(format++))){
if(span != '%'){
//uart_put_char(span);
trans_buff.data[i]=span;
i++;
}else{
span = *(format++);
if(span == 'c'){
j = va_arg(arg_ptr,int);//get value of char
uart_put_char(j);
}elseif(span == 'd'){
j = va_arg(arg_ptr,int);//get value of char
#if0
if(j<0){
uart_put_char('-');
j = -j;
}
#endif
puti(j,DECIMAL_OUTPUT);
}elseif(span == 's'){
s = va_arg(arg_ptr,char *);//get string value
puts(s);
}elseif(span == 'o'){
j = va_arg(arg_ptr,unsignedint);//get octal value
puti(j,OCTAL_OUTPUT);
}elseif(span == 'x'){
j = va_arg(arg_ptr,unsignedint);//get hex value
puti(j,HEX_OUTPUT);
}elseif(span == 0){
break;
}else{
uart_put_char(span);
}
}
}
va_end(arg_ptr);
trans_buff.dma_len = i;
uart_dma_send((unsignedchar*)&trans_buff);
return0;
}
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Author's other topics
Hi,
please refer to the source code to achieve your own functions.at the same time you can download driver SDK for reference.