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Modify uart example to work with UART4

Ignacio Velasco

Prodigy 65 points

I am trying to modify the uart_echo example using UART4 instead of UART0 on an ICE board. I can connect with the ICE through the pins in J12 with a terminal but the characters displayed on the terminal do not correspond with the characters I intend to send (i.e. if I send char 0x31 I get char 0x67; send 0x32 and get 0x7c).

Can someone help setting up UART4 for serial communication (RS232)?

Thanks,

over 13 years ago

0 Ignacio Velasco over 13 years ago

Prodigy 65 points

As a further question:

Can I connect the RS232 terminal directly to the UART4 RXD/TXD pins 39 and 40 of J12 or do I need an RS232 line driver/receiver?

Thanks,

0 Ignacio Velasco over 13 years ago in reply to Ignacio Velasco

Prodigy 65 points

Problem solved by adding a line driver/receiver to the UART4 output of the ICE and configuring pinmux correctly for UART4.

//uart4_rxd_mux1

HWREG(SOC_CONTROL_REGS + CONTROL_CONF_UART_CTSN(0)) = 1 | CONTROL_CONF_UART0_CTSN_CONF_UART0_CTSN_PUDEN |

CONTROL_CONF_UART0_CTSN_CONF_UART0_CTSN_RXACTIVE;

//uart4_txd_mux1

HWREG(SOC_CONTROL_REGS + CONTROL_CONF_UART_RTSN(0)) = 1;

0 Hendrik Klasen over 10 years ago in reply to Ignacio Velasco

Intellectual 770 points

i want to use the uart4, too.

can be more detailed?

where do i have to modify the pinmux?

kind regards