diff --git a/Cargo.toml b/Cargo.toml
index 0d1977f..a1b766c 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -16,5 +16,5 @@ opt-level = 0
 
 [profile.release]
 panic = "abort"
-opt-level = "z"
+opt-level = "s"
 lto = true
\ No newline at end of file
diff --git a/src/clk/mod.rs b/src/clk/mod.rs
index 8ffe66c..e913c70 100644
--- a/src/clk/mod.rs
+++ b/src/clk/mod.rs
@@ -1,28 +1,33 @@
 use crate::{
     ccu,
-    io::{read32, write32},
-    print,
+    io::{read32, write32,sdelay},    
 };
 
+
+
 fn set_pll_cpux_axi() {
     let mut val:u32;
-    /* Select cpux clock src to osc24m, axi divide ratio is 3, system apb clk ratio is 4 */    
+	
+    /* Select cpux clock src to osc24m, axi divide ratio is 3, system apb clk ratio is 4 */
+	val = (0 << 24) | (3 << 8) | (1 << 0);
+	
     write32(
         ccu::BASE + ccu::CPU_AXI_CFG_REG,
-        (0 << 24) | (3 << 8) | (1 << 0),
+        val
     );
-    // // sdelay(1);
+    sdelay(1);
 
     // /* Disable pll gating */
     val = read32(ccu::BASE + ccu::PLL_CPU_CTRL_REG);
+	// print!("v={:#?}\r\n",val);
     val &= !(1 << 27);
-    write32(ccu::BASE + ccu::PLL_CPU_CTRL_REG, val);
+    write32(ccu::BASE + ccu::PLL_CPU_CTRL_REG, val);	
 
     // /* Enable pll ldo */
     val = read32(ccu::BASE + ccu::PLL_CPU_CTRL_REG);
     val |= 1 << 30;
     write32(ccu::BASE + ccu::PLL_CPU_CTRL_REG, val);
-    // sdelay(5);
+    sdelay(5);
 
     // /* Set default clk to 1008mhz */
     val = read32(ccu::BASE + ccu::PLL_CPU_CTRL_REG);
@@ -42,7 +47,7 @@ fn set_pll_cpux_axi() {
 
     /* Wait pll stable */
     while (!(read32(ccu::BASE + ccu::PLL_CPU_CTRL_REG) & (0x1 << 28)))==0{}
-    // sdelay(20);
+    sdelay(20);
 
     // /* Enable pll gating */
     val = read32(ccu::BASE + ccu::PLL_CPU_CTRL_REG);
@@ -53,14 +58,14 @@ fn set_pll_cpux_axi() {
     val = read32(ccu::BASE + ccu::PLL_CPU_CTRL_REG);
     val &= !(1 << 29);
     write32(ccu::BASE + ccu::PLL_CPU_CTRL_REG, val);
-    // // sdelay(1);
+    sdelay(1);
 
     // /* set and change cpu clk src to PLL_CPUX, PLL_CPUX:AXI0 = 1008M:504M */
     val = read32(ccu::BASE + ccu::CPU_AXI_CFG_REG);
     val &= !(0x07 << 24 | 0x3 << 16 | 0x3 << 8 | 0xf << 0);
     val |= 0x03 << 24 | 0x0 << 16 | 0x0 << 8 | 0x1 << 0;
     write32(ccu::BASE + ccu::CPU_AXI_CFG_REG, val);
-    // // sdelay(1);
+    sdelay(1);
 }
 
 fn set_pll_periph0()
@@ -100,7 +105,7 @@ fn set_pll_periph0()
         };
     }
 	
-	// sdelay(20);
+	sdelay(20);
 
 	/* Lock disable */
 	val = read32(ccu::BASE + ccu::PLL_PERI0_CTRL_REG);
@@ -112,21 +117,21 @@ fn set_ahb()
 {
 	write32(ccu::BASE + ccu::PSI_CLK_REG, (2 << 0) | (0 << 8));
 	write32(ccu::BASE + ccu::PSI_CLK_REG, read32(ccu::BASE + ccu::PSI_CLK_REG) | (0x03 << 24));
-	// sdelay(1);
+	sdelay(1);
 }
 
 fn set_apb()
 {
 	write32(ccu::BASE + ccu::APB0_CLK_REG, (2 << 0) | (1 << 8));
 	write32(ccu::BASE + ccu::APB0_CLK_REG, (0x03 << 24) | read32(ccu::BASE + ccu::APB0_CLK_REG));
-	// sdelay(1);
+	sdelay(1);
 }
 
 fn set_dma()
 {
 	/* Dma reset */
 	write32(ccu::BASE + ccu::DMA_BGR_REG, read32(ccu::BASE + ccu::DMA_BGR_REG) | (1 << 16));
-	// sdelay(20);
+	sdelay(20);
 	/* Enable gating clock for dma */
 	write32(ccu::BASE + ccu::DMA_BGR_REG, read32(ccu::BASE + ccu::DMA_BGR_REG) | (1 << 0));
 }
@@ -139,7 +144,7 @@ fn set_mbus()
 	val = read32(ccu::BASE + ccu::MBUS_CLK_REG);
 	val |= 0x1 << 30;
 	write32(ccu::BASE + ccu::MBUS_CLK_REG, val);
-	// sdelay(1);
+	sdelay(1);
 
 	/* Enable mbus master clock gating */
 	write32(ccu::BASE + ccu::MBUS_MAT_CLK_GATING_REG, 0x00000d87);
@@ -162,7 +167,7 @@ fn set_module(addr:u32)
 
 		/* Wait pll stable */
         while(!(read32(addr) & (0x1 << 28)))==0{};
-        // sdelay(20);
+        sdelay(20);
 
 	// 	/* Lock disable */
 		val = read32(addr);
@@ -203,4 +208,31 @@ pub fn sunxi_clk_get_peri1x_rate()->u32
 	    return (((24 * plln)/(pllm * p0)) >> 1) as u32 * 1000 * 1000;
 	}
 	0u32
+}
+
+pub fn sunxi_clk_dump()->u32
+{
+    let reg32:u32;
+//    uint32_t cpu_clk, plln, pllm;
+let p0:u8;
+ let p1:u8;
+
+
+	/* PLL CPU */
+	// reg32 = read32(ccu::BASE + ccu::CPU_AXI_CFG_REG);
+	reg32 = read32(ccu::BASE + ccu::PLL_CPU_CTRL_REG);
+//	if (reg32 & (1 << 31)) {
+	    p0 = (reg32 >> 16) as u8 & 0x03;
+	    if p0 == 0 {
+		p1 = 1;
+	    } else if p0 == 1 {
+		p1 = 2;
+	    } else if p0 == 2 {
+		p1 = 4;
+	    } else {
+		p1 = 1;
+	    }
+let pr:u32 = ((((reg32 >> 8) & 0xff) + 1) * 24)/( p1 as u32 );
+		pr
+	    
 }
\ No newline at end of file
diff --git a/src/dram/mod.rs b/src/dram/mod.rs
new file mode 100644
index 0000000..5a19103
--- /dev/null
+++ b/src/dram/mod.rs
@@ -0,0 +1,211 @@
+use crate::{
+    io::{read32, sdelay, write32},
+    print,
+};
+#[repr(C)]
+#[derive(Clone, Copy)]
+struct DramPara_t {
+    //normal configuration
+    dram_clk: u32,
+    dram_type: u32, //dram_type			DDR2: 2				DDR3: 3		LPDDR2: 6	LPDDR3: 7	DDR3L: 31
+    //unsigned int        lpddr2_type,	//LPDDR2 type		S4:0	S2:1 	NVM:2
+    dram_zq: u32, //do not need
+    dram_odt_en: u32,
+    //control configuration
+    dram_para1: u32,
+    dram_para2: u32,
+    //timing configuration
+    dram_mr0: u32,
+    dram_mr1: u32,
+    dram_mr2: u32,
+    dram_mr3: u32,
+    dram_tpr0: u32, //DRAMTMG0
+    dram_tpr1: u32, //DRAMTMG1
+    dram_tpr2: u32, //DRAMTMG2
+    dram_tpr3: u32, //DRAMTMG3
+    dram_tpr4: u32, //DRAMTMG4
+    dram_tpr5: u32, //DRAMTMG5
+    dram_tpr6: u32, //DRAMTMG8
+    //reserved for future use
+    dram_tpr7: u32,
+    dram_tpr8: u32,
+    dram_tpr9: u32,
+    dram_tpr10: u32,
+    dram_tpr11: u32,
+    dram_tpr12: u32,
+    dram_tpr13: u32,
+}
+
+impl DramPara_t {
+    pub fn init(self) -> u32 {
+        let mut rc: u32;
+        let mut mem_size: u32;
+        // Test ZQ status
+        if self.dram_tpr13 & 0x10000 != 0 {
+            print!("DRAM only have internal ZQ!!\r\n");
+            write32(0x3000160, read32(0x3000160) | 0x100);
+            write32(0x3000168, 0);
+            sdelay(10);
+        } else {
+            write32(0x3000160, read32(0x3000160) & 0xfffffffc);
+            write32(0x7010254, self.dram_tpr13 & 0x10000);
+            sdelay(10);
+            write32(0x3000160, (read32(0x3000160) & 0xfffffef7) | 2);
+            sdelay(10);
+            write32(0x3000160, read32(0x3000160) | 0x001);
+            sdelay(20);
+            print!("ZQ value = 0x{:x}\r\n", read32(0x300016c));
+        }
+
+        // Set voltage
+        self.vol_set();
+
+        // Set SDRAM controller auto config
+        if (self.dram_tpr13 & 0x1) == 0 {
+            if self.auto_scan_dram_config() == 0 {
+                print!("auto_scan_dram_config() FAILED\r\n");
+                return 0;
+            }
+        }
+
+        // Print header message (too late)
+        print!("DRAM BOOT DRIVE INFO: {:?}\r\n", "V0.24");
+        print!("DRAM CLK = {:?} MHz\r\n", self.dram_clk);
+        print!("DRAM Type = {:?} (2:DDR2,3:DDR3)\r\n", self.dram_type);
+        if (self.dram_odt_en & 0x1) == 0 {
+            print!("DRAMC read ODT  off.\r\n");
+        } else {
+            print!("DRAMC ZQ value: 0x{:x?}\r\n", self.dram_zq);
+        }
+
+        // report ODT
+        rc = self.dram_mr1;
+        if (rc & 0x44) == 0 {
+            print!("DRAM ODT off.\r\n");
+        } else {
+            print!("DRAM ODT value: 0x{:x?}.\r\n", rc);
+        }
+
+        // Init core, final run
+        if (self.mctl_core_init() == 0) {
+            print!("DRAM initialisation error : 1 !\r\n");
+            return 0;
+        }
+
+        // Get sdram size
+        rc = self.dram_para2;
+        if rc < 0 {
+            rc = (rc & 0x7fff0000u32) >> 16;
+        } else {
+            rc = self.get_size();
+            print!("DRAM SIZE = {:?}M\r\n", rc);
+            // self.dram_para2 = (self.dram_para2 & 0xffffu32) | rc << 16;
+        }
+        mem_size = rc;
+
+        // #if 0
+        //     // Purpose ??
+        //     if (self.dram_tpr13 & (1 << 30)) {
+        //         rc = read32(self.dram_tpr8);
+        //         if (rc == 0) {
+        //             rc = 0x10000200;
+        //         }
+        //         write32(0x31030a0, rc);
+        //         write32(0x310309c, 0x40a);
+        //         write32(0x3103004, read32(0x3103004) | 1);
+        //         print!("Enable Auto SR");
+        //     } else {
+        // #endif
+        write32(0x31030a0, read32(0x31030a0) & 0xffff0000);
+        write32(0x3103004, read32(0x3103004) & (!0x1));
+        //	}
+
+        // Pupose ??
+        rc = read32(0x3103100) & !(0xf000);
+        if (self.dram_tpr13 & 0x200) == 0 {
+            if (self.dram_type != 6) {
+                write32(0x3103100, rc);
+            }
+        } else {
+            write32(0x3103100, rc | 0x5000);
+        }
+
+        write32(0x3103140, read32(0x3103140) | (1 << 31));
+        if (self.dram_tpr13 & (1 << 8)) != 0 {
+            write32(0x31030b8, read32(0x3103140) | 0x300);
+        }
+
+        rc = read32(0x3103108);
+        if (self.dram_tpr13 & (1 << 16)) != 0 {
+            rc &= 0xffffdfff;
+        } else {
+            rc |= 0x00002000;
+        }
+        write32(0x3103108, rc);
+
+        // Purpose ??
+        if self.dram_type == 7 {
+            rc = read32(0x310307c) & 0xfff0ffff;
+            rc |= 0x0001000;
+            write32(0x310307c, rc);
+        }
+
+        self.enable_all_master();
+        if (self.dram_tpr13 & (1 << 28)) != 0 {
+            rc = read32(0x70005d4);
+            // if ((rc & (1 << 16))!=0 || dramc_simple_wr_test(mem_size, 4096))!=0 {
+            //     return 0;
+            // }
+        }
+        mem_size
+    }
+    fn vol_set(self) {
+        let mut reg = 0;
+        let mut vol = 0;
+
+        match self.dram_type {
+            2 => {
+                vol = 47;
+            }
+
+            3 => {
+                vol = 25;
+            }
+
+            _ => {
+                vol = 0;
+            }
+        }
+
+        vol = 25; // XXX
+
+        reg = read32(0x3000150);
+        reg = (reg & 0xffdf00ff) | vol << 8;
+        /*
+            reg = read32(0x3000150);
+            reg &= ~(0xff00);
+            reg |= vol << 8;
+            reg &= ~(0x200000);
+        */
+        write32(0x3000150, reg);
+
+        sdelay(1);
+
+        // sid_read_ldoB_cal(para);
+    }
+
+    fn auto_scan_dram_config(self) -> u32 {
+        return 0u32;
+    }
+    fn mctl_core_init(self) -> u32 {
+        return 0u32;
+    }
+    fn get_size(self) -> u32 {
+        return 0u32;
+    }
+    fn enable_all_master(self) {}
+
+    fn dramc_simple_wr_test(mem_size: u32, test: u32) -> u32 {
+        0u32
+    }
+}
diff --git a/src/io/mod.rs b/src/io/mod.rs
index 211c72f..25b6052 100644
--- a/src/io/mod.rs
+++ b/src/io/mod.rs
@@ -14,4 +14,22 @@ pub fn read32(addr:u32)->u32
         value = core::ptr::read_volatile(addr as *const u32);                
     }
     value
+}
+
+pub fn sdelay(ticks:u32) {
+    let mut rnd_addr = 0u32;
+    let addr = &mut rnd_addr as *mut u32;
+    let mut z: u32 = ticks;
+    unsafe {
+        // asm!(
+        // "1:",
+        // "subs {0}, {0}, #1",
+        // "bne 1b",
+        // in(reg) i
+        // );
+        while z > 0 {
+            core::ptr::write_volatile(addr, z);
+            z -= 1;
+        }
+    }
 }
\ No newline at end of file
diff --git a/src/main.rs b/src/main.rs
index 71c37c6..ef5cc7b 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -8,6 +8,9 @@ use rt::entry;
 entry!(main);
 
 use rt::cpu;
+
+use crate::io::read32;
+use crate::io::write32;
 pub mod ccu;
 pub mod clk;
 pub mod gpio;
@@ -15,6 +18,7 @@ pub mod io;
 pub mod print;
 pub mod sdhci;
 pub mod uart;
+pub mod dram;
 
 fn main() -> ! {
     uart::init();
@@ -24,10 +28,27 @@ fn main() -> ! {
     let pin22: u32 = 1 << 22;
     //инициализация порта D ноги 22
     gpio::init(gpio_d, 22, gpio::PD22_Select::Output as u8);
-    print!("PD22 inited\n");
+    // print!("PD22 inited\n");
+    // let clk=clk::sunxi_clk_get_peri1x_rate();
+    // print!("PLL={:?} Hz\r\n",clk);
     clk::init();
-    let clk=clk::sunxi_clk_get_peri1x_rate();    
-    print!("{:?}\r\n",clk);
+    let pr = clk::sunxi_clk_dump();
+    print!("CLK={:?} MHz\r\n", pr);
+    /* ?? */
+    let mut reg32 = read32(0x070901f4);
+    if (reg32 & 0x1f) != 0 {
+        reg32 = (reg32 & 0xffffff8f) | 0x40;
+        reg32 = (reg32 & 0xffffff8f) | 0xc0;
+        reg32 = (reg32 & 0xffffff8e) | 0xc0;
+        write32(0x070901f4, reg32);
+        print!("fix vccio detect value:0x{:X?}\r\n", reg32);
+    }
+
+    let addr = 0x0200180Cu32;
+	let val  = (1 << 16) | (1 << 0);
+	write32(addr, val);
+	delay();
+
     //мигаем
     loop {
         unsafe {
diff --git a/src/print.rs b/src/print.rs
index c378eea..225341f 100644
--- a/src/print.rs
+++ b/src/print.rs
@@ -1,8 +1,10 @@
-use core::fmt;
 use crate::uart;
+use core::fmt;
 
+#[no_mangle]
+#[inline(always)]
 pub fn _print(args: fmt::Arguments) {
-    pub use core::fmt::Write;    
+    pub use core::fmt::Write;
     uart::console().write_fmt(args).unwrap();
 }
 
@@ -21,6 +23,6 @@ macro_rules! print {
 macro_rules! println {
     () => ($crate::print!("\n"));
     ($($arg:tt)*) => ({
-        $crate::print::_print(format_args_nl!($($arg)*));
+        $crate::print::_print(format_args!($($arg)*));
     })
-}
\ No newline at end of file
+}