Am 07.06.20 um 22:22 schrieb Philipp Klaus Krause:
> Am 07.06.20 um 21:41 schrieb Eric Rullens:
>> Just a wild guess after browsing the manual: the UART pins can be selected
>> via S1_S[1:0] in P_SW1, and this setting does not seem to have a default?
>>
>> Eric
>
> Interesting find, but when I try explicitly setting it to 0, it it
> doesn't make a difference.
>
> Philipp
Looks like I can't get the UART to work on IAP15W4K58S4 either, tried
the following there (the IAP15W4K58S4 is being calibrated to 24 Mhz):
#include <stdio.h>
__sfr __at(0x88) TCON;
__sfr __at(0x89) TMOD;
__sfr __at(0x8b) TL1;
__sfr __at(0x8d) TH1;
__sfr __at(0x98) SCON;
__sfr __at(0x99) SBUF;
int putchar(int c)
{
while(!(SCON & 0x02));
SCON &= ~0x02;
SBUF = c;
return (c);
}
void main(void)
{
unsigned long int i = 0;
// Configure UART for 9600 baud, 8 data bits, 1 stop bit.
TMOD = 0x20;
SCON = 0x40;
TH1 = 256 - 24.0 * 1000 * 1000 / 12 / 32 / 9600 + 0.5;
TCON |= 0x40;
SCON |= 0x02; // Tell putchar() the UART is
ready to send.
for(;;)
{
printf("Hello World!\n");
for(i = 0; i < 147456; i++); // Sleep
}
}
Philipp
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