| Line 176... |
Line 176... |
char terminal_buffer[2];
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char terminal_buffer[2];
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|
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neorv32_uart_printf("Select new clock prescaler (0..7): ");
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neorv32_uart_printf("Select new clock prescaler (0..7): ");
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neorv32_uart_scan(terminal_buffer, 2, 1); // 1 hex char plus '\0'
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neorv32_uart_scan(terminal_buffer, 2, 1); // 1 hex char plus '\0'
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uint8_t prsc = (uint8_t)hexstr_to_uint(terminal_buffer, strlen(terminal_buffer));
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uint8_t prsc = (uint8_t)hexstr_to_uint(terminal_buffer, strlen(terminal_buffer));
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|
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if ((prsc >= 0) && (prsc < 8)) { // valid?
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if ((prsc >= 0) && (prsc < 8)) { // valid?
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TWI_CT = 0; // reset
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TWI_CT = 0; // reset
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TWI_CT = (1 << TWI_CT_EN) | (prsc << TWI_CT_PRSC0);
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TWI_CT = (1 << TWI_CT_EN) | (prsc << TWI_CT_PRSC0);
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neorv32_uart_printf("\nDone.\n");
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neorv32_uart_printf("\nDone.\n");
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}
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}
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| Line 187... |
Line 188... |
neorv32_uart_printf("\nInvalid selection!\n");
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neorv32_uart_printf("\nInvalid selection!\n");
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return;
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return;
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}
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}
|
|
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// print new clock frequency
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// print new clock frequency
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uint32_t clock = SYSINFO_CLK;
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uint32_t div = 0;
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switch (prsc) {
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switch (prsc) {
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case 0: clock = clock / 2; break;
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case 0: div = 4 * 2; break;
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case 1: clock = clock / 4; break;
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case 1: div = 4 * 4; break;
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case 2: clock = clock / 8; break;
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case 2: div = 4 * 8; break;
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case 3: clock = clock / 64; break;
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case 3: div = 4 * 64; break;
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case 4: clock = clock / 128; break;
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case 4: div = 4 * 128; break;
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case 5: clock = clock / 1024; break;
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case 5: div = 4 * 1024; break;
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case 6: clock = clock / 2048; break;
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case 6: div = 4 * 2048; break;
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case 7: clock = clock / 4096; break;
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case 7: div = 4 * 4096; break;
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default: clock = 0; break;
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default: div = 0; break;
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}
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}
|
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uint32_t clock = SYSINFO_CLK / div;
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neorv32_uart_printf("New I2C clock: %u Hz\n", clock);
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neorv32_uart_printf("New I2C clock: %u Hz\n", clock);
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}
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}
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|
|
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/**********************************************************************//**
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/**********************************************************************//**
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