extraem
Member
I'm considering using the Maple board for a project I'm working on and was wondering what the maximum baud rates were. From older posts, it looks like the chip itself can run up to 4.5 Mbps on one serial line and on the others up to 2.25 Mbps, but there was a code bug that limited it to 225 Kbps per second. Has this been fixed or does the Maple baud rate still max out at 225000 instead of 2250000?
Thanks!
extraem
Member
It looks like the baud rates have been updated with the correct 4.5 Mbps and 2.5 Mbps max serial rate definitions.
I found the Maple library source code and usart.c had these lines verifying the max rates:
/*
* Devices
*/
static ring_buffer usart1_rb;
static usart_dev usart1 = {
.regs = USART1_BASE,
.rb = &usart1_rb,
.max_baud = 4500000UL,
.clk_id = RCC_USART1,
.irq_num = NVIC_USART1
};
/** USART1 device */
usart_dev *USART1 = &usart1;
static ring_buffer usart2_rb;
static usart_dev usart2 = {
.regs = USART2_BASE,
.rb = &usart2_rb,
.max_baud = 2250000UL,
.clk_id = RCC_USART2,
.irq_num = NVIC_USART2
};
/** USART2 device */
usart_dev *USART2 = &usart2;
static ring_buffer usart3_rb;
static usart_dev usart3 = {
.regs = USART3_BASE,
.rb = &usart3_rb,
.max_baud = 2250000UL,
.clk_id = RCC_USART3,
.irq_num = NVIC_USART3
};
/** USART3 device */
usart_dev *USART3 = &usart3;
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