Dear community,
I want to convert some YUV422 images on RAM Memory to
RGB565 images by using IPU's IC module and IDMAC (ch#12, #20) as following diagram.
[Mem(YUV422)] -> [IDMAC(ch#12)] -> [IC Encode] ->[IDMAC(ch#20)] -> [Mem(RGB565)]
This flow is described in i.MX6Solo Reference Manual(IMX6SDLRM Rev.2) page2965.
But IDMAC's ch#12 does not move (IDMAC_CH_BUSY_12 is not set).
Please tell me how to start IDMAC and IC move.
= Appendix =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
I will show a brief flow of my software & environment.
SOC = iMX6 Solo
Memory = DDR3 512MByte(Cached)
1. reset IPU
*(volatile uint32_t *)SRC_BASE |= 0x8;
*(volatile uint32_t *)IPU_MEM_RST = 0x807fffff;
udelay(30000);
/* wait until MEM_RST negate */
2. configure IDMAC (ch12, 20) & enable it.
/*
config CPMEM of ch12 and ch20
*/
... // omit because this block is so big.
/*
config IDMAC register
*/
*(volatile uint32_t *)IPU_IDMAC_CH_EN1 = ((1 << 12) | (1 << 20));
3. configure IC(Encode Task) & enable it.
/*
config TPMEM for CSC(ColorSpace Conversion)
*/
... // omit because this block is so big.
/*
config IC registers
*/
*(volatile uint32_t *)IPU_IC_PRP_VF_RSC = 0x20002000;
// No Downsizing
*(volatile uint32_t *)IPU_IC_IDMAC1 &= ~(1 << 0); // burst size of CB1 = 8
*(volatile uint32_t *)IPU_IC_IDMAC1 &= ~(1 << 20); // no Flip
*(volatile uint32_t *)IPU_IC_IDMAC2 = (480-1); // set Height = 480
*(volatile uint32_t *)IPU_IC_IDMAC3 = (720-1); // set Width = 720
*(volatile uint32_t *)IPU_IC_CONF = 0x40000003; // enable RWE, CSC, Encode
4. copy YUV422 image into Memory (address is identical with IDMAC ch#12)
and flush it to DRAM.
...
5. set ready flag of DMA buffer
I dont't know this configuration is required or not to move.
*(volatile uint32_t *)IPU_CH_BUF0_RDY0 |= (1 << 12);
6. Finaly, set IPU enable.
*(volatile uint32_t *)IPU_CONF = 0x4; // enable IC
=> result is described before.
Best Regards,
Koichi Sakagami
